Planning & EstimatingCâu 501 / 700
A concrete slab is 30 ft by 40 ft and 4 inches thick. How many cubic yards of concrete are required?
a.About 4.4 cubic yards
b.About 8.9 cubic yards
c.About 12.0 cubic yards
d.About 14.8 cubic yards
Giải thích
Convert thickness: 4 in = 0.333 ft. Volume = 30 x 40 x 0.333 = 400 cubic feet. Cubic yards = 400 / 27 = about 14.8. Option a forgets to convert thickness properly. Option b halves the result. For flatwork, always convert the thickness from inches to feet before computing volume, then divide by 27.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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