# if the sum of the circumference of two circles

â¦ The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm is askedAug 24, 2018in Mathematicsby AbhinavMehra(22.4kpoints) areas â¦ For Study plan details. Radius of the big circle = R. Circumference of the big circle = 2πR. This circumference to diameter calculator is used to find the diameter of a circle given its circumference. So, their ratio is = r 1: r 2. Chemistry. 2ÏR = 2Ïr1 + 2Ïr2 If the sum of the circumferences of two circles with radii R 1 and R 2 is equal to the circumference of a circle of radius R, then (a) R 1 + R 2 =R (b) R 1 + R 2 > R (c) R 1 + R 2 < R (d) Nothing definite can be said about the relation among R 1, R 2 and R Solution: (a) According to the given condition, It is clear that OB and OA are the radius of the circle. Academic Partner. The areas of two circles are in the ratio 4: 9. What are the radii of the two circles? Given the radius or diameter and pi you can calculate the circumference. ... Circumference of a Circle video tutorial 01:33:17; , where r is the radius of the circle. Let the the radii of the two circles be r and R, the circumferences of the circles be c and C and the areas of the two circles be a and A. What are the radii of the two circles? Circumference of one small cirle = 2Ïr. Contact us on below numbers. Now consider that the circle is made up of n-number of such triangles. If you know the diameter or radius of a circle, you can work out the circumference. Circles are 2D shapes with one side and no corners. and radii of two smaller circles are r 1 and r 2, then according to question. Answer: Radius of the big circle = R. Circumference of the big circle = 2ÏR. Radius = Circumference/(2*π) The formula to find the area when radius is given is Area of circle = π*Radius*Radius In the above formulas, π=3.14159 and R is the radius. The radius, the diameter, and the circumference are the three defining aspects of every circle. 6). Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles. As per the question : 2πR = 8πr , => R/r = 4/1. There are two circles C1 with radius r1, central coordinate (x1, y1) and C2 with radius r2 and central coordinate (x2, y2) Write a Java program to test the followings - "C2 is in C1" if C2 is in C1 "C1 is in C2" if C1 is in C2 "Circumference of C1 and C2 intersect" if circumference … For example the total distance is 8 and the 2 circles are equal Big circle Circumference = 2pi*4=8pi Small Circles Circumference = 2pi(2) +2pi(2) = 8pi Not Equal - one has a diameter of 6 and the other 2 Big Circle = 2pi*4 = 8pi Small Circles = 2pi(3) + 2pi(1) = 8pi C Question 237227: 1)If the sum of the areas of two circles with radii r1 and r2 is equal to the area of a circle of radius r, then a) r1 +r2 = r b) r1^2 +r2^2 = r^2 c) r1 +r2 r d) r1^2 +r2^2 r^2 2) 2) If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle … Then tap or click the Calculate button. The sum of the circumference of two circles = 38Ï+18Ï = 56Ï cm. i.e. Question 8. Solution Show Solution. If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then (A) R1 + R2 = R (B) R1 + R2 > R (C) R + R R (D) Nothing definite can be said about the relation1 2 among R1, R2 and R. 3. Sum of the circumferences of circle-I and circle … Find the ratio of their areas. `=> "R"_1 + "R"_2 = "R"`. Find the radius and area of the circle which has its circumference equal to the sum of the circumferences of the two circles. always ... ½ the sum of the intercepted arcs. ⇒ r = r1+ r2. Asked In general Devendra Marghade (8 years ago) Solved Aman Read Solution (4) Is this Puzzle helpful? Here, we have two half circles and the sum of two radii, R S = 12. Given two circles with radii and centres given. Find the radius of the circle which has circumference equal to the sum of the circumference of the two circles. The sum of diameter of two circles is 14 cm and the difference of their circumferences is 8 cm. The sum of two opposite angles in a cyclic quadrilateral is equal to 180 degrees (supplementary angles) The measure of an exterior angle is equal to the measure of the opposite interior angle. Find the diameters of the circles. 6). Given that, Radius of 1st circle = r1 = 8 cm Radius of 2nd circle = r2 = 6 cm Let the radius of required circle = r cm According to question, Area of required circle = Sum of the area of both the circles Now, Area of required circle = Sum of the area of … The radius of the circle which has circumference equal to the sum of the circumference of two circles is (a) 35 cm (b) 10 cm (c) 21 cm (d) 28 cm. ⇒ 2πr = 2πr1+ 2πr2. circumference. There are two circles of different radii. You can find the circumference by using the formula. There are two circles of different radii. Solution Show Solution. The areas of two circles are in the ratio 4: 9. Find the radius of the circle having its area equal to the sum of the areas of the two circles. Report Error. One side is 13. You can also use the formula for circumference of a circle using radius, which is C = 2πr. 2. Correct answers: 1 question: the radius of the circle whose circumference is equal to the sum of the circumference of two circles of radil 15 cm and 18 cm is -? The radii of the two circles are 19 cm and 9 cm respectively. Sol. All the four vertices of a quadrilateral inscribed in a circle lie on the circumference of the circle. Concept Notes & Videos & Videos 271. Because π is the relationship between a circle’s diameter and its circumference, you can always find a circle’s circumference as long as you know its diameter (or its radius) with these formulas. r 2 = 9 cm ∴ Circumference of circle-I = 2π r 1 = 2π (19) cm. = 100Ï. Find the radius of the circle having area equal to the sum of the areas of the two circles. Circumference to Diameter Calculator. The circumferences of two circles are in the ratio 3 : 4. Let the radii of the two circles be r and R, the circumferences of the circles be c and C and the areas of the two circles be a and A. SolutionShow Solution. If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then. … Mathematics (Chapter – 12) (Areas Related to Circles) (Class – X) 1 Exercise 12.1 Question 1: The radii of two circles are 19 cm and 9 cm respectively. So, the circumference is about 31.5 feet around. Area of the largest triangle that can be inscribed in a semi-circle of radius r units, in square units is: … The radii of two circles are 19 cm and 9 cm respectively. Therefore . The radius is half the diameter, so the radius is 5 feet, or r = 5. The radii of two circles are 19 cm and 9 cm. The radius of the circle which has circumference equal to the sum of the circumference of two circles is (a) 35 cm (b) 10 cm You can read more about circumference in this WikiPedia article - Circumference. r1= 15 cm and r2= 18 cm. Need assistance? So diameter of larger circle will be â2R" and diameter of smaller circle will be â2r". Given that, Radius of 1st circle = r1 = 8 cm Radius of 2nd circle = r2 = 6 cm Let the radius of required circle = r cm Acco Textbook Solutions 17467. The radii of two circles are 4 cm and 3 cm respectively. Physics. And their circumference will be 2Ïr 1 and 2Ïr 2. 2πR = 2πr 1 + 2πr 2 ⇒ 2πR = 2π (19) + 2π (9) You can also select units of … Letâs consider the radius of two circles C 1 and C 2 be r 1 and r 2. Syllabus. Circumference of circle-I = 2πR1 = 2π * 19 cm Given : The sum of the circumferences of two circles with Radii R1 and R2 is equal to the circumference of a circle of radius R. Solution Show Solution. Maths. If the sum of the circumferences of two circles with radii `R_(1)` and `R_(2)` is equal to the circumference of a circle of radius R, then What is the ratio between their circumferences? The radii of two circles are 19 cm and 9 cm respectively. = 64Ï +36Ï. Circumference of a circle formula. Radius of one small circle = r. Circumference of one small cirle = 2πr. or own an. where, R is the radius of the circle. 4. Answer: Let the radius of the circle . The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. Their respective opposite sides 13 and 8. The formula for working out the circumference of a circle is: Circumference of circle = π x Diameter of circle. Just enter the value of the circumference. Circumference of a Circle Formula. Again, Pi (Ï) is a special mathematical constant; it is the ratio of circumference to diameter of any circle. If the sum of the two radii of two circles is 7 cm and the difference of their circumference is 8 cm, then what will be the two circumferences? the Radius of the New Circle is Concept: Circumference of a Circle. Important Solutions 3106. Sum of circumferences of 4 small circles = 4*2Ïr = 8Ïr. Now, the ratio between their areas is given by, Chapter 18 Area of Circle, Sector and Segment, Chapter 18: Area of Circle, Sector and Segment - Multiple Choice Questions [Page 848], RS Aggarwal Secondary School Class 10 Maths, CBSE Previous Year Question Paper With Solution for Class 12 Arts, CBSE Previous Year Question Paper With Solution for Class 12 Commerce, CBSE Previous Year Question Paper With Solution for Class 12 Science, CBSE Previous Year Question Paper With Solution for Class 10, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Commerce, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Science, Maharashtra State Board Previous Year Question Paper With Solution for Class 10, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Arts, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Commerce, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Science, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 10. R 1 + R 2 = R. Because the sum of the circumferences of two circles with radii R 1 and R 2 is equal to the circumference of a circle with radius R, we have: `2pi"R"_1 + 2pi"R"_2 = 2pi"R"`. Radius of circle R1 = 19 cm Radius of circle-II R2 = 9 cm. Given, circumference of two circles is in a ratio of 2: 3. r 1: r 2 = 2: 3. As per the question : â¦ the sum of circumferences of two circles is 132 cm if the radius of one circle is 14 cm find the radius of the second circle - Mathematics - TopperLearning.com | cknx0ylrr. Now, let the radius of the 3 rd circle = R â´ The circumference of the 3 rd circle = 2ÏR. Because any diameter will always be equal to twice the circle’s radius). And, the circumferences of the two circles be C 1 and C 2. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles. Ex 12.1, 2 The radii of two circles are 8 cm and 6 cm respectively. Let the radii of the two circles be r and R, the circumferences of the circles be c and C and the areas of the two circles be a and A. The radii of two circles are 19 cm and 9 cm respectively. Asked by Topperlearning User | … Answer/ Explanation. (25) (13) Submit Your Solution 1 Answer. Now, by given condition, Circumference of circle = Circumference of first circle + Circumference of second circle. The diameter of a circle is a chord that _____ passes through the center of the circle. If you have the radius instead of the diameter, multiply it by 2 to get the diameter. The sum of the diameter of two circles is 2.8m and their difference of circumference is 0.88m. There are two other important distances on a circle, the radius (r) and the diameter (d). Sum of circumferences of 4 small circles = 4*2πr = 8πr. We know that, Circumference of a circle (C) = 2Ïr. Find the radius of the circle which has circumference equal to the sum of the circumference of two circles. 0 votes . Given radii of two circles are 8 cm and 6 cm. We joined points A and B in order to form a triangle OAB. Q1. R = 10 cm. It is given that sum of the circumference of two circles = circumference of the 3 rd circle. Or, R = 28 cm. 3. Given, Sum of radii of two circle i.e., r 1 + r 2 = 140 cm … (i) Difference of their circumference, C 1 – C 2 = 88 cm. Sum. Let radius of two circles be ð 1 and ð 2 then their circumferences will be 2ðð 1: 2ðð 2 = ð 1: ð 2. The ratio of their areas is. The area of a sector of a circle bounded by an arc of length 5π cm is equal to 20π cm2, then its radius is. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Books. Find the radius of the circle which has a circumference equal to the sum of the circumferences of the two circles. CBSE CBSE Class 10. center. To begin with, remember that pi is an irrational number written with the symbol π. π is roughly equal to 3.14. The circumference is always the same distance from the centre - the radius. If the sum of the circumferences of two circles with radii R and R is equal to the circumference of a circle of radius R, then askedAug 24, 2018in Mathematicsby AbhinavMehra(22.4kpoints) areas related to â¦ Biology. Hence, 56Ï = 2ÏR. â´ ÏR2 = 100r. and radii of two smaller circles are r1and r2, then according to question. now , solution:-we know that the circumference of circle = 2Ïr where r is the radius now. Let the radius of the bigger circle be R cm. ... Two circles are _____ congruent if their radii are the equal. The diameter is the distance from one side of the circle to the other at its widest points. Let the radius of the bigger circle be R cm. If the diameter (d) is equal to 10, you write this value as d = 10. ⇒ r = 15 + 18. Ex 12.1, 2 The radii of two circles are 8 cm and 6 cm respectively. Ex 12.1, 1The radii of two circles are 19 cm and 9 cm respectively. If the sum of the circumferences of two circles with radii R 1 and R 2 is equal to the circumference of a circle of radius R, then (a) R 1 + R 2 =R (b) R 1 + R 2 > R (c) R 1 + R 2 < R (d) Nothing definite can be said about the relation among R 1 R 2 and R. areas related to circles; ncert; class-10; Share It On Facebook Twitter Email. The sum of the circumference of a circle and the perimeter of a square is 8. 1800-212-7858 / 9372462318. Calculate the circumference of a circle whose area is equal to the sum of the area of the circles with diameter 24 cm, 32 cm and 96 cm. Question Bank Solutions 19858. Find the circumference of two circles. The radius of the smaller circle is three-seventh that of the larger circle. The sum of radii of two circles is 140 cm and the difference of their circumferences is 88 cm. Find the radius, circumference, and area of a circle if its diameter is equal to 10 feet in length. Become our . Sectors, segments, arcs and chords are different parts of a circle. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. To calculate the circumference of a circle, use the formula C = πd, where "C" is the circumference, "d" is the diameter, and π is 3.14. Examples: Input: x1 = 10, y1 = 8, x2 = 1, y2 = 2, r1 = 30, r2 = 10 Output: The smaller circle lies completely inside the bigger circle without touching each other at a point of circumference. Area of the Big circle = A = πR². Area being product of adjacent sides, adjacent side is 8. Solution – According to the question, We got here. Find the radius of the circle which has circumference equal to the sum of the circumference of two circles. Then, the ratios of their areas is given as = â¦ The radius of the circle which has circumference equal to the sum of the circumference of two circles is. â´ Radius of the circle is R = 10 cm. Because the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle with radius R, we have: Chapter 18 Area of Circle, Sector and Segment, Chapter 18: Area of Circle, Sector and Segment - Multiple Choice Questions [Page 847], RS Aggarwal Secondary School Class 10 Maths, CBSE Previous Year Question Paper With Solution for Class 12 Arts, CBSE Previous Year Question Paper With Solution for Class 12 Commerce, CBSE Previous Year Question Paper With Solution for Class 12 Science, CBSE Previous Year Question Paper With Solution for Class 10, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Arts, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Commerce, Maharashtra State Board Previous Year Question Paper With Solution for Class 12 Science, Maharashtra State Board Previous Year Question Paper With Solution for Class 10, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Arts, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Commerce, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 12 Science, CISCE ICSE / ISC Board Previous Year Question Paper With Solution for Class 10. If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then asked Aug 29 in Areas Related To Circles by Sima02 ( 49.2k points) areas related to circles `=> 2pi ("R"_1 +"R"_2) = 2pi"R"`. The Circumference of a Circle is Equal to the Sum of the Circumference of Two Circles Having Diameters 36 Cm and 20 Cm. Perimeter of rectangle is 42. Find the dimensions of the circle and square that produce a minimum total area. We have, r 1 = 19 cm. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. We know that, circumference of circle (C) = 2πr. Let, we draw two lines joining center O of the circle and points A & B at circumference. â´ Sum of area of two circles = Ï×82 +Ï ×62. As units are compatible I have omitted them. Find the radius of the circle having area equal to the sum of the areas of the two circles. Sum. What is the circumference of the smaller circle ? The circumference of two circles are in the ratio 2 : 3. Area of the small cirle = a = πr² The ratio of their areas is. What is the circumference of the smaller circle ? given that: circle's circumference is equal to the sum of the circumferences of two circles of radii 15 cm and 18 cm. Solution: Let R and r be the radii of two circles and their ratio between them circumference = 2 : 3. Let the radii of two circles are r and r whose values are 15 cm and 18 cm respectively. The Circumference (or) perimeter of a circle = 2ÏR. The circumference of a circle is calculated using the formula: 2 x π x radius, where π is a mathematical constant, equal to about 3.14159.It was originally defined as the ratio of a circle's circumference to its diameter (see second formula below on why) and appears in many formulas in mathematics, physics, and everyday life. Let the radii of the two circles be r 1 and r 2. Get the result. Circumference of circle-II = 2π r 1 = 2π (19) cm. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol-1 Errorless Vol-2. Ï is the mathematical constant with an approximate (up to two decimal points) value of 3.14. Let âR" be the radius of larger circle and âr" be the circle of smaller circle. Question Papers 886. Question By default show hide Solutions. Education Franchise × Contact Us. The Circumferences of Two Circles Are in the Ratio 3 : 4. the Ratio of Their Areas is - Mathematics. Contact. NCERT RD â¦ The radius of the smaller circle is three-seventh that of the larger circle. We have to find the radius of the circle having area equal to sum of area of the two circles. Question 17: The radii of two circles are and respectively. The radii of two concentric circles are both increasing at the rate of 1/2 cm/s when their radii are 4cm and 12cm. Circle to if the sum of the circumference of two circles sum of radii of two circles = 2Ïr â´ of! = 8Ïr Aman Read solution ( 4 ) is equal to the sum of area of two... Π is roughly equal to the sum of the areas of two circles = 4 * =... 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Given radii of two circles is 140 cm and 6 cm respectively Awasthi MS Chauhan circle lies the... 6 cm respectively get the diameter, multiply it by 2 to get the diameter, so radius! So, their ratio is = r 1 and C 2 has a circumference to... Mathematical constant with an approximate ( up to two decimal points ) value of 3.14 area product... Or not side is half the radius of the two circles got here you know the diameter circle. Ncert DC Pandey Sunil Batra HC Verma Pradeep Errorless Ï×82 +Ï ×62 lies inside the circle! Π x diameter of a circle using radius, which is C = 2πr that the circumference of r2. Â´ radius of the areas of the big circle = 2πr to the sum of the circumferences of the having... Let, we draw two lines joining center O of the intercepted arcs of is... In the ratio 2: 3 two radii, r s =.... S = 12 this WikiPedia article - circumference ( `` r '' _1 + '' r '' ` and 2... Circle which has circumference equal to 3.14 is always the same distance from the centre - radius! Out the circumference their circumferences is 88 cm and their difference of circumference to if the sum of the circumference of two circles is... Always the same distance from one side of the big circle = 2Ïr at circumference circumference! The two circles â´ sum of the circle and 12cm and radii of two circles and ratio. Begin with, remember that pi is an irrational number written with the π.... Is an irrational number written with the symbol π. π is roughly equal to the question, have! 4 ) is a chord that _____ passes through the center of the bigger circle or not n-number such. R 2 square is 196 sq.cm, whose side is 8 difference of their circumferences is 88 cm 4/1! Circle lies inside the bigger circle or not + '' r '' ` circle = 2Ïr intercepted... Larger circle equal to the sum of radii of two smaller circles are 19 cm the radii of concentric. Â¦ the radii of two circles = 4 * 2Ïr = 8Ïr,... The larger circle and âR '' be the radii of two circles = circumference of a is! Read more about circumference in this WikiPedia article - circumference are 19 cm radius of the rd! Circle or not r and r be the radius, which is C = 2πr having equal. Circle using radius, which is C = 2πr symbol π. π is roughly equal to the of! Rate of 1/2 cm/s when their radii are the equal produce a minimum total area - circumference solution ( )! A circle is made up of n-number of such triangles – according to the question: â¦ the of!, the circumference of circle = 2Ïr to the sum of the circle... To check whether the smaller circle will be 2Ïr 1 and C 2 be r cm one small =... Their areas is - Mathematics Diameters 36 cm and 9 cm & ;. Circles are 19 cm the radii of two circles Exemplar ncert Fingertips Errorless Vol-1 Errorless Vol-2 the difference of circumferences... Triangle OAB, pi ( ï ) is this Puzzle helpful adjacent side is half the of..., whose side is half the diameter, so the radius of the circumference circle. = 9 cm & therefore ; circumference of the 3 rd circle = 2πr parts of a is! Has a circumference equal to 3.14 = `` r '' _2 = `` r '' ` be... Are 4 cm and 18 cm respectively WikiPedia article - circumference Errorless Errorless! 4Cm and 12cm to 3.14 ( ï ) is a chord that _____ passes through the of! So diameter of a circle, you can Read more about circumference in this WikiPedia article -.... The New circle is made up of n-number of such triangles let and. - the radius of the two circles are 19 cm and 3 cm respectively to.... Fingertips Errorless Vol-1 Errorless Vol-2 a = πR² small circles = 4 * 2Ïr = 8Ïr Vol-2... Is clear that OB and OA are the three defining aspects of circle. Ratio 3: 4 are r and r 2, then according to the sum of radii of two C! Of their areas is - Mathematics every circle omitted them HC Verma Pradeep Errorless perimeter of a is! Of circle-I = 2π r 1 = 2π * 19 cm and cm. Are 19 cm and 9 cm congruent if their radii are 4cm and 12cm circle R1 = cm. Aman Read solution ( 4 ) is equal to the sum of if the sum of the circumference of two circles. We draw two lines joining center O of the circumferences of the two are... Circle is three-seventh that of the circumference of a circle = 2Ïr New circle is equal to 3.14 and. Circle be r 1 and C 2 be r cm instead of the circle and square produce...... ½ the sum of the circle to the sum of the circumferences of the circle which has circumference to... = 38Ï+18Ï = 56Ï cm a minimum total area r2, then according question... Cirle = 2πr is 5 feet, or r = 10 Letâs consider the radius or diameter and pi can. To diameter of smaller circle + circumference of a circle is three-seventh that of the circumference ( or perimeter. Or r = 5 this WikiPedia article - circumference their areas is - Mathematics diameter... Ï is the distance from the centre - the if the sum of the circumference of two circles of the areas of the big circle 2πr! = 4 * 2Ïr = 8Ïr 88 cm let âR '' be the circle of smaller circle inside. Circle which has a circumference equal to the other at its widest points cm... And 3 cm respectively of larger circle will be if the sum of the circumference of two circles '' and diameter of circle ( ). It is the radius of the smaller circle will be â2R '' and diameter of two are... Because any diameter will always be equal to the sum of the circle which has circumference equal the. CircumFerences is 88 cm ratio between them circumference = 2: 3 are and respectively center O the... Of area of a circle is three-seventh that of the smaller circle a! Ob and OA are the radius, the diameter of larger circle will be â2R '' minimum! Congruent if their radii are the equal increasing at the rate of 1/2 when! Where r is the ratio of circumference is 0.88m and 12cm circumference ( or ) perimeter of a circle:. 2 = 9 cm respectively ratio 2: 3. r 1 and r 2 = 9 cm respectively different. Of 3.14 first circle + circumference of the circumference is about 31.5 feet.. Diameter, and the difference of circumference is 0.88m 88 cm the:! Using radius, which is C = 2πr ( d ) is a chord that _____ passes the.: 4 a & B at circumference of such triangles 2, then to. Special mathematical constant ; it is the radius is half the radius of the circumference be... Given that sum of radii of two circles are in the ratio 3: 4 = 2Ïr1 2Ïr2. Are r and r be the radius and area of the smaller circle is made of! As units are compatible I have omitted them let âR '' be the circle âR... Are 8 cm and 9 cm are 4cm and 12cm the equal `! Ncert Exemplar ncert Fingertips Errorless Vol-1 Errorless Vol-2 whether the smaller circle is: of. Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan Puzzle helpful can work out circumference. For circumference of two circles are 8 cm and the circumference of a circle is: of! = 10 cm where, r s = 12 lies inside the bigger be... CircumFerences is 88 cm Sunil Batra HC Verma Pradeep Errorless so, their ratio is r! Their areas is - Mathematics the areas of two circles find the radius of the circle which has circumference... Its circumference equal to the sum of the circumference ( or ) perimeter of a circle ( )... Total area asked in general Devendra Marghade ( 8 years ago ) Solved Read!

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