Question

find area of a circular ring with outer radius 20cm and inner radius 15cm​

Answer 1

Step-by-step explanation:

Area of ring = π ( R 2 − r 2 ) =π(R2-r2) ⇒ ⇒ Area of ring Read more on Sarthaks.com - https://www.sarthaks.com/1226688/find-the-area-of-a-ring-whose-outer-and-inner-radii-are-respectively-20-cm-and-15-cm

Answer 2

Answer:

Area of circular ring = π(r1^2-r2^2)

=3.14(20^2-15^2)

=3.14(400-225)

=3.14×175

=549.50cm^2