since c of the pool is 18
then 2pieR = 18
/2
pieR=9
/pie
R=9/pie
the radius is 9/pie
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Assuming the pool is a perfect circle, it is 18 x pi feet or about 56.55 feet.
Multiply the radius by 2, then multiply that result by the value of Pi - and you'll have your answer.
The radius of a circle with a circumference of 110 is: 17.507
The circumference of a circle with a radius of 6.7 is: 42.097
Radius of a circle = circumference/2*pi