Question

The ratio of circumference of two circles is 5:3. Find the ratio of their radius​

Answer 1

Answer:

Let the radii of the given circles be 5x and 3x respectively and let their circumferences be C 1 and C 2 respectively.

Circumference of a circle =2πr

Then, C 1 =2×π×5x=10π

and C 2 =2×π×3x=6πx

∴ C 2:C 1

= 6πx :10πx

C 2: C 1

= 5:3

Hence, the ratio of the circumference of the given circles is 5:3..

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