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mass = volume x density So multiply the 1 cubic yard of the substance by the density (expressed in tons per cubic yard) of the substance.
2850 pounds per yard
3 feet per yard
Quite probably 1 cubic inch!
The volume of a cylinder is a product of its length, the square of its radius, and the irrational number pi. The radius is half the diameter, so that the volume of this cylinder in cubic feet is (4)(0.5)2(pi) = about 3.14 cubic feet. There are 27 cubic feet per cubic yard, so that this equals 3.14/27 = about 0.12 cubic yard, where the last digit is depressed because it may not be significant -- there is only a single significant digit given for the dimensions of the cylinder.