The north wall of a barn is a rectangle 60 feet high and 55 feet long. There are five windows in the wall, each 4 by 4 feet. If a gallon of paint will cover 400 square feet, how many gallons of paint must the painter buy to paint the wall?
A) 9
B) 8
C) 10
D) 11
E) none of these

Question

Quizplus · Accepted Answer

The total area of the wall is 60 feet * 55 feet = 3300 square feet. The total area of the five windows is 5 * (4 feet * 4 feet) = 80 square feet. The area to be painted is 3300 square feet - 80 square feet = 3220 square feet. Since one gallon covers 400 square feet, the number of gallons needed is 3220 square feet / 400 square feet/gallon = 8.05 gallons. Since you can't buy a fraction of a gallon, the painter must buy 9 gallons.

The North Wall of a Barn Is a Rectangle 60