Question

4. The ratio of radii of two circles is 8:9. Find the ratio of their circumference and also find the ratio of their areas.
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Answer 1

Hii frnd...

Let the radius of first cicle be 8x (r1) and second be 9x (r2)

Ratio of circumference= 2pie r1 / 2 pie r2

2 pie cancel 2 pie

so the ratio will be 8:9

Ratio of area= pie r1^2 / pie r2^2

pie cancel pie

so the ratio will be 64:81

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Answer 2

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