Question

area of two circle are in the ratio 9:16 find the ratio of their circumference?

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Answer 1

Answer:

3:4

Step-by-step explanation:

Let A1 = 9 and A2 = 16

Area of A1 / Area of A2 = 9 / 16

pi*r1^2 / pi*r2^2 = 9/16

r1 / r2 = 3 / 4

Now circumference is given by 2*pi*r

C1 : C2

= 2*pi*r1 : 2*pi*r2

= 2*pi*3 : 2*pi*4

= 3 : 4

Ratio of circumference is 3 : 4.

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Answer 2

Answer:

3 : 4

Explained in the attachment.