Need help on the question below.

A pool has a diameter of 12 ft. There is a sidewalk that extends 3 ft out from the side of the pool. How many feet of fencing will be needed to go around the sidewalk?
Thanks...

2 answers

You need fencing to go around a circle with a diameter of 18 feet.

C = 3.14 * 18

C = ?
A pool company will install a round swimming pool in the middle of a yard that measures 40 ft. by 20 ft. If the pool is 12 ft. in diameter, how much of the yard will still be available? :