Question

The circumference of two circles are in the ratio 3 : 7. Find the ratio of their areas.

Answer 1

Answer:

9/49

Step-by-step explanation:

circumference = 2πr

circumference ratio = 2πr1/2πr2=3/7

r1/r2=3/7.....1

area =πr^2

area ratio = πr1^2/πr2^2 = r1^2/r2^2

from 1

r1^2/r2^2=(3/7)^2

9/49

hope it helps u