Question

The area (A) of a ring is A = π r2 - π s2.
Find the area A if π = 3.14, r = 6 and s = 4.
A = 62.8
A = 197.192
A = 31.4
A = 6.28

Answer 1

A

Answer 2

Don't even need a calculator...
pi r^2 - pi s^2 = pi (r^2-s^2) = pi (r+s)(r-s) = 3.14 *10*2 = 62.8