Civil Engineering PE

Answer: B - A circular lime softening tank that is 12-foot in diameter and a 10-foot water depth can hold approximately 8,460 gallons.

Solution: Capacity of circular tank (on end) = area x height of tank

Where Circular tank area = diameter² x 0.7854
= 144 ft² x 0.7854
= 133.10 ft²

Given 7.48 gallons = 1 ft³

Capacity = 133.10 ft² x 10 ft x 7.48 gallons/ft³

= 8,460 gallons (approximate)