Question

To drain a round swimming pool that is 18.0 ft wide and 3.75 ft deep, a worker uses a pump that can move 7.58 gallons of water per minute. how many minutes will it take to drain the swimming pool?

Answer 1

Area swimming pool is pi*r^2 and that x h is the area of a cylinder. That gives you cubic feet. Let's call that 1000 cubic feet.
1 gallon = 0.134 cubic feet.
7.58 gallons/min x (0.134 ft^3/gallon) = about 0.8 ft^3/min
0.8 ft^3/min x ?min = 1000 ft^3
Solve for min