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 if he is going to paint the four walls of the room?(1 point)
Responses
6 gallons
6 gallons
1 gallon
1 gallon
4 gallons
4 gallons
5 gallons
The four walls of the room have a combined area of 4 * (20 ft * 20 ft) = 1600 square feet.
Since a gallon of paint can cover 400 square feet, the painter needs 1600 / 400 = 4 gallons of paint.
Therefore, the correct answer is 4 gallons.