Planning & EstimatingCâu 73 / 100
A patio is 12 ft by 15 ft and will be poured 4 inches thick. How many cubic yards of concrete are needed (before waste)?
a.About 2.2 cubic yards
b.About 6.7 cubic yards
c.About 0.7 cubic yards
d.About 15 cubic yards
Giải thích
Convert 4 inches to 0.333 feet, then 12 x 15 x 0.333 equals about 60 cubic feet, divided by 27 equals about 2.2 cubic yards. Contractors often add roughly 5 to 10 percent for waste and spillage. Ordering slightly extra avoids a short pour.
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