Question

A painter needs to paint the four walls of a square shaped room. One wall has a side length of 12 feet. One gallon of paint covers 400 square feet.



What is the MINIMUM number of gallons the painter will need to complete the room?



A.
4 gallons

B.
3 gallons

C.
2 gallons

D.
1 gallon

Answer 1

If the room is square with each wall 12 ft by 12 ft, each wall has area 144 ft². Four walls total 4·144 = 576 ft². At 400 ft² per gallon, you need 576/400 = 1.44 gallons, so you must buy 2 gallons.

Answer: C. 2 gallons.