Question

the circumference of two circle are in the ratio 2:3 . the ratio between their area is

Answer 1

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Ratio of circumference=2:3
ratio of radius=circumference/circumference=2πr/2πr
2/3=2πr/2πr
r/r=2/3=2:3
ratio of area=πr square/πr square
=4/9
=4:9

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