how many bags of .5 cubic ft of gravel needed to fill a 17"wx40'Lx5"h ditch

how many bags of .5 cubic feet  cubic feet of gravel is needed to fill a 17"w x 40' L:x 5"h drainage ditch
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1 Answer

17 in * 40 ft * 5 in

17/12 ft * 40 ft * 5/12 ft

3400/144 ft^3

23.611 ft^3 (about)

Since it's 2 bags (0.5 ft^3 each) per cubic foot, you need 47.222 bags or (since you can't buy a fractional bag) 48 bags.

Answer:  48 bags
by Level 13 User (103k points)

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