2 concentric circles have radii 2cm and 3cm respectively, calculate the ratio of their areas

Question

asked Dec 4, 2021 142k views

1 Answer

Chengcj · Answer 1 · 2021-12-11T00:35:36+0000

Answer:For the first circle the radius is 2cm and for the second circle the radius is 3cm,by taking the ratio of their areas:

πr^2:πR^2

π cancels out and we are left with only r^2:R^2

r=2cm and R=3cm

Therefore r^2:R^2=2^2:3^2

=4:9

The answer is 4:9

Explanation: