Question

One gallon of paint covers 400 square feet. What is the least amount of paint needed to paint the walls of a room in the shape of a rectangular prism with a length of 20 feet, a width of 16 feet, and a height of 10 feet? Write your answer as a decimal.

Answer 1

1.8 gallons would be used.

Explanation:

TOTAL AREA TO BE PAINTED:

2 x 10 x 20 + 2 x10x 16 = 720 ft2

720 ft2 / 400 ft2 /gal = 1.8 gal