Planning & Estimating第 74 / 100 题
A room has four walls totaling 800 sq ft of surface. The paint covers 400 sq ft per gallon and you plan two coats. How many gallons are needed?
a.2 gallons
b.3 gallons
c.4 gallons
d.1 gallon
解析
One coat needs 800 / 400 = 2 gallons, and two coats need 2 x 2 = 4 gallons. Estimating both coats up front ensures enough material and consistent color from the same batch. Round up to whole containers when purchasing.
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