Leon wants to paint the four walls in his dining room Each w

Leon wants to paint the four walls in his dining room. Each wall is 8 feet high by 30 feet wide. A quart of paint covers 40 ft2. How many gallons of paint must he purchase?

A. 6

B. 8

C. 12

D. 15

Solution

B. Here you need to calculate the number of square feet in the garden and then determine how many ounces of fertilizer are needed. The area of a rectangular garden is calculated by multiplying the length × the width. So in this problem the area is 21 ft². If you need 2 oz of fertilizer for every square foot, then you need to multiply 2 by the number of square feet.

21 × 2 = 42 oz