Question 50642
AREA=PI*R^2 OR AREA=3.14*15^2 OR AREA=3.14*225 OR AREA=706.5 SQFT FOR THE SURFACE AREA OF THE POOL.

706.5*X*7.5=22,000 OR 5,298.75X=22,000 OR X=22,000/5,298.75 OR X=4.15 FT