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Q: How much concrete will you need to fill a hole that is 18 inches around and 24 inches deep?

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22/7x6x6x6 cubic inches

6,400 ft3

25 feet is equal to 300 inches. The radius of a hole is half its diameter, which equals 4 inches. The volume of the cylinder is given by the formula v = [Pi]r2h, so the volume of your hole is 3.14 * 16 * 300 = 15080 cubic inches. There are 1728 cubic inches to the cubic foot, so you'll need about 8.75 cubic feet of concrete, which is about a third of a yard. (More exactly, that's a cubic yard, but concrete guys just say "yard.")

nah

About 21 cubic feet

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22/7x6x6x6 cubic inches

None, as a hole which is 6 inches wide and 42 inches long has no depth and thus no volume.

6,400 ft3

509.7 litres

How deep? 1 inch will take .7 yards

29.45 cubic feet or 183.45 US gallons.

Depends on the length of the hole.

33.5 cubic feet.

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