Question

A circle has area which is 100 times the area of another circle.what is the ratio of their circumferences.

Answer 1

the ratio of their circumference is 10 times of other.

Answer 2

let A1 and A2 be the area of two circle
A2=100A1
let s1 and s2 be the circumference of two circle
r1 and r2 be the radii of two circles
A2/A1 = r2^2/r1^2=100
takin square roots
r2/r1 =10
s2/s1 =r2/r1 =10
ans is 10:1