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How much dirt is needed to fill a One Foot deep hole 18 foot circumferance?
Wiki User
∙ 12y ago
We have to assume that the hole is shaped like a cylinder, with a flat bottom.
Volume of a cylinder = (pi) R2 L = (area of the flat end) x (length).
Area of the circular flat end of the hole = (circumference)2/(4 pi)
(You don't see this formula too often. I worked it out in the process of doing
a lot of WikiAnswering, and it's a very convenient tool to have available.)
Volume of the cylindrical hole = (area of the end) x (length)
= (circumference)2 x (length)/(4 pi) = (182 x 1)/(4 pi) = 25.783 cubic feet = 0.955 cubic yard (rounded)
Wiki User
∙ 12y ago
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