Geometry
posted by Need Help .
A gallon of paint costs $20 and covers 465 square feet. Three coats of paint are recommended for even coverage. The room to be painted is 12 feet high, 20 feet long, and 20 feet wide.
How many gallons are needed to paint the walls?

A = 4 * 12 * 20
A = 960 sq. ft.
960 * 3 = 2,880
2,880 / 465 = ?