SOLUTION: find the shaded area of the outer circle. The length of the radius of the outer circle is 36.0 ft., and the radius of the inner circle is 20.0 ft.

Algebra ->  Circles -> SOLUTION: find the shaded area of the outer circle. The length of the radius of the outer circle is 36.0 ft., and the radius of the inner circle is 20.0 ft.      Log On


   

Question 191225: find the shaded area of the outer circle. The length of the radius of the outer circle is 36.0 ft., and the radius of the inner circle is 20.0 ft.
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!


The shaded area you're referring I guess is the Area outside the inner circle.

We'll see the figure:



Then, working Eqn ----> A=pi%2Ar%5E2

First, find the Area of Inner circle.
A%5Bi%5D=pi%2Ar%5Bi%5D%5E2=pi%2A20%5E2
red%28A%5Bi%5D=400%2Api%29sq.ft.


Next, find the Area of Outer Circle.
A%5Bo%5D=pi%2Ar%5Bo%5D%5E2=pi%2A36%5E2
red%28A%5Bo%5D=1296%2Api%29sq.ft.


So, Area%5Bsh%5D=A%5Bo%5D-A%5Bi%5D=1296%2Api-400%2Api
red%28highlight%28A%5Bsh%5D=896%2Api%29%29sq.ft. (Answer)


Thank you,
Jojo