SOLUTION: Charlie and Sharon ihave a circular pool in their back yard. They bought some fencing to put around the pool, but by mistake, Charlie ordered exactly the circumference of the pool.

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Question 1116661: Charlie and Sharon ihave a circular pool in their back yard. They bought some fencing to put around the pool, but by mistake, Charlie ordered exactly the circumference of the pool. If they want the fence to be 4 ft from the pool on all sides, how many more feet of fencing do they need?
My work so far:
2(3.14)(4) = 25.12 circumference of the pool
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
The circumference and perimeter are neither given.

pool circumference 2pi%2Ar
pool radius r


Charlie wants fence to be around circular region of radius r+4, so the amount of extra fencing he needs now is:

highlight%282pi%28r%2B4%29-2pi%2Ar%29
-
2pi%2Ar%2B8pi-2pi%2Ar
8pi---------25.12, OR, 25.13----------------------------------?