Core TradesCâu 168 / 700
A driveway slab measures 24 ft by 30 ft and is 4 inches thick. Approximately how many cubic yards of concrete are required (no waste allowance)?
a.6.7 cubic yards
b.8.9 cubic yards
c.11.9 cubic yards
d.26.7 cubic yards
Giải thích
Volume = 24 x 30 x (4/12) = 240 cubic feet; 240 / 27 = about 8.9 cubic yards. The 6.7 figure omits part of the area, 11.9 assumes a thicker slab, and 26.7 mistakenly leaves the thickness in feet as a whole number instead of converting 4 inches to 0.33 ft.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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