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| Math Central | Quandaries & Queries |
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Question from RHONDA, a parent: In an 18 x 33 ft area how much is 4 yards of sand in inches to cover this area. |
Hi Rhonda,
18 feet is 18/3 = 6 yards and 33 feet is 33/3 = 11 yards. Thus the surface area is 6 × 11 = 66 square yards. If the thickness of the cover is T yards then the volume is 66 × T cubic yards. But the volume is 4 cubic yards so
66 × T = 4
and hence
T = 4/66 = 0.0606 yards.
There are 36 inches in a yard so 0.0606 yards is 0.0606 × 36 = 2.2 inches which is approximately 2 3/16 inches.
Penny
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