volume = area*length = Pi/4*(1.52)*20 feet*12inches = 424.115 cubic inches
424.115 / 1728 cu.in. = 0.2454 cubic feet
(0ne cu.ft. = 1728 cu.in.)
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The volume of a cylinder is pi * r^2 * height. For a 10 foot pipe with a 1 foot internal diameter (1/2 foot radius), the volume is: ~ 3.1416 * (.5)^2 * 10 = 7.854 cu. ft. of water (or anything else)
volume = pi * r 2* l = 3.1416*1.252 * 500 = 2454.375 cu ft 1 cu ft = 6.2288 imp gallon 2454.375 cu ft = 15287.811 gallons or say 15288.
There are 1.093611 cu. yds in a cu. m so a cubic metre is about 10% bigger than a cubic yard
10 x 10 x 2/3 ie 66.67 cu ft = 66.67/27 cu yds, call it 2-and-a-half.
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