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| Math Central | Quandaries & Queries |
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Question from Celeste, a parent: I have a 27ft. above ground pool. I want to put edging around it but do not know how many feet of edging I need. Can You help? The edging will be approximately 2 feet away from the pool. |
Hi Celeste,
The circumference of a circle is π times the diameter. I am assuming that 27 feet is the diameter of the pool but your edging is 2 feet away from the pool on both sides so the diameter of the circle of edging is 31 feet. Thus the circumference is
π × 31 = 3.1416 × 31 = 97.39 feet.
I hope this helps,
Penny
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