Question

A ring-shaped region is shown below.

Its inner diameter is 14 yd., and its outer diameter is 20 yd.

Answer 1

160.14yd²

Explanation:

first we find both of their areas then we subtract the small one f4om the big one

A=πr²

step 1 find area of large circle

A=3.14×(10²)

A=3.14×100

A=314

step 2 find are of small circle

A=3.14×(7²)

A=3.14×49

A=153.86

step 3 subtract small area from big area

314-153.86=160.14