Question

A cylindrical swimming pool has a diameter of 16 feet and a height of 4 feet. About how many gallons of water can the pool contain? Round your answer to the nearest whole number. (1 ft³ ≈ 7.5 gal)

Answer 1

First let's calculate the volume of the pool (cylinder)

V=πR².h==>V=π(8)²(4) = 804.248 ft³.
1 gal in ft³ = 1/7.5 =0.133

The number of galons needed to fill the swimming pool :

804.248/0.133 ===> 6,047 galons