Planning & EstimatingQuestion 538 of 700
A concrete sidewalk is 4 ft wide, 75 ft long, and 4 inches thick. Ignoring waste, approximately how many cubic yards of concrete are needed?
a.About 3.7 cubic yards
b.About 1.9 cubic yards
c.About 11.1 cubic yards
d.About 7.4 cubic yards
Explanation
Convert thickness: 4 in = 0.333 ft. Volume = 4 x 75 x 0.333 = about 100 cubic feet. Cubic yards = 100 / 27 = 3.70. Option b halves the value. Option c wrongly treats the thickness as feet. Option d doubles the result. Always convert inches to feet, compute cubic feet, then divide by 27.
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