What is the radius of a cilcle 18 ft around?

Question

If a swimming pool is 18 ft around, what is the radius?

Answer 1

Assuming this is a circular pool as the wording suggests:

circumference:  c = 2πr

 

2πr = 18

πr = 9

r = 9/π

 

If you need the numerical value use the balue of pi

to however many decimals you need and do the division.