A storm pipe run needs 240 ft of bedding, 4 ft wide and 6 in. thick. Including a 10 percent ordering allowance, how many cubic yards of bedding aggregate are needed?
Correct Answer
B) 19.6 cy
Bedding volume is 240 x 4 x 0.5 = 480 cf. 480/27 = 17.8 cy; adding 10 percent gives 17.8 x 1.10 = 19.6 cy. Other choices omit the allowance, add too much allowance, or treat 6 in. as 0.6 ft.
Why This Is the Correct Answer
Bedding volume is 240 x 4 x 0.5 = 480 cf. 480/27 = 17.8 cy; adding 10 percent gives 17.8 x 1.10 = 19.6 cy. Other choices omit the allowance, add too much allowance, or treat 6 in. as 0.6 ft.
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