SOLUTION: I have a circular pool with a radius of ten feet They want to install a 3 foot sidewalk around The pool What will be the area of the sidewalk

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Question 853154: I have a circular pool with a radius of ten feet
They want to install a 3 foot sidewalk around The pool
What will be the area of the sidewalk
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The outside border of the sidewalk includes the ten feet for the pool; so this outside border is based on radius 10+3=13 feet.

pi%2A13%5E2-pi%2A10%5E2=AreaoftheSidewalk
69%2Api square feet.