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
4 gallons
4 gallons
5 gallons
5 gallons
1 gallon
1 gallon
6 gallons
6 gallons
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The total area of all four walls can be found by multiplying the area of one wall by 4. The area of one wall is 20 ft x 20 ft = 400 square feet. Therefore, the total area of all four walls is 400 square feet x 4 = 1600 square feet.
Since one gallon of paint can cover 400 square feet, the painter will need 1600 square feet / 400 square feet = 4 gallons of paint.
Therefore, the painter should buy 4 gallons of paint.