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ICSE Class 9 Answered

the sum of radii of two circles is 140cm and difference of their circumference is 88cm find the radii of two circles
Asked by sreenivas.reddy | 22 Jan, 2020, 07:07: AM
answered-by-expert Expert Answer
Let R and r be the radii of the two circles.
According to the question,
R + r = 14 ...(i)
Also, 2∏(R - r) = 88 
R - r = 88/22 × 7/2 
R - r = 140 ...(ii)
Solving (i) and (ii)
we get R = 77 cm and r = 63 cm
Answered by Sneha shidid | 22 Jan, 2020, 08:48: AM

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