A painter is going to paint a room shaped like a cube, with square walls that are 20 ft. on each side. A gallon of paint can be used to cover 400 square feet. How many gallons of paint should the painter buy?

You are wrong robot, IT'S 4 GALLONS NOT 1 GALLON!!!!!!!!!!

OR 5 ETHERšŸ˜”

5 gallons of paint should be bought. 20 ft. x 20 ft. = 400 sq. ft. 400 sq. ft. / 400 sq. ft. per gallon = 1 gallon. 1 gallon x 5 = 5 gallons.