Question

Given teo circles whose radii are 9" and 24", the ratio of thuer circumfrence is?

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Answer 1

The ratio is 3:8

Explanation:

The circumference of a circle can be calculated using the formula;

C = 2 * pi * r

for 9 inches;

C = 2 * pi * 9 = 18 pi inches

For 24 inches;

C = 2 * pi * 24 = 24 pi inches

The ratio is thus;

18 pi : 48 pi

divide through by 6 pi

= 3: 8