Question

A bathtub, in the shape of a rectangular prism, measures 8 feet long by 3 feet wide by 2 feet deep. If the tub fills at a rate of 5 cubic feet per minute, then how many minutes will it take to fill the bathtub?

Answer 1

Explanation:

The volume of the tub is 5 ft * 3 ft * 1.5 ft = 22.5 ft^3

Three-fourths full makes the amount (3/4)(22.5 ft^3) = 16.875 ft^3

Draining at 1 ft^3 / min, it takes almost 17 minutes (16 7/8