To Cover A 18ft Circle With 2 Inches Of Sand How Much Do I Need?
Answer:
The volume of the sand is its area times its depth. It works best to use consistent units. You may be buying the sand by the cubic yard, but we'll start next to cubic feet.
v = (Pi*r2)h = Pi*(9 ft)2*(1/6 ft) = Pi*81/6 ft3 = 13.5*Pi ft3
≈ 42.4115 ft3
≈ (42.4115 ft3)(1 yd/(3 ft))3 = 42.4115/27 yd3
≈ 1.57 yd3
Your circle can be covered to the desired depth by 42.4 ft3 of sand, about 1.6 yd3.
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