Core TradesCâu 127 / 700
A continuous footing is 12 inches wide, 12 inches deep, and 60 feet long. How many cubic yards of concrete are required (before waste)?
a.1.7 cubic yards
b.2.2 cubic yards
c.3.3 cubic yards
d.6.7 cubic yards
Giải thích
12 inches equals 1 foot, so the cross-section is 1 ft x 1 ft = 1 sq ft. Volume = 1 x 60 = 60 cubic feet. Divide by 27: 60 / 27 = 2.2 cubic yards. 6.7 comes from dividing by 9 instead of 27; the other choices are arithmetic errors.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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