The unit pounds per foot is a linear weight measurement, for a rod, tube, or beam of a known diameter or cross-section. Divide the total weight in pounds by the length of the sample.
Much more useful is the unit pounds per square foot(related to psi, pounds per square inch), which gives either bearing weight or pressure for a known mass when distributed over a given area.
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You mean foot pounds, not feet per pound. Work = weight x distance = 500 x 60 =3000 foot - pounds
Unfortunately, this question is unanswerable. Pounds per square foot is the imperial unit for density. Density is the amount of mass for a unit volume. Since you have provided only the mass of the object, and no volume, the Density cannot be determined.
16" pipe per foot = 9.17 Gallons for 16" SCH 40 pipe we just had to figure it out in our engineering department was looking for a short cut and ran across your post.
ABOUT 43 bags. Dry sand weighs ABOUT 100 lbs per cubic foot- and you need 21.3 cubic feet.
It would cost $1.40 per pound.