Planning & EstimatingCâu 490 / 700
A continuous concrete footing is 18 inches wide, 12 inches deep, and 120 ft long. How many cubic yards of concrete are needed?
a.About 6.7 cubic yards
b.About 13.3 cubic yards
c.About 2.2 cubic yards
d.About 20.0 cubic yards
Giải thích
Convert inches to feet: 18 in = 1.5 ft, 12 in = 1.0 ft. Volume = 1.5 x 1.0 x 120 = 180 cubic feet. Divide by 27 to get cubic yards: 180 / 27 = about 6.7 cubic yards. Option b doubles it. Option c forgets to convert the depth. Always convert all dimensions to feet, then divide cubic feet by 27 for cubic yards.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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