There is no direct correlation between volume (cubic feet) and weight. You must specify the material to be measured or the density of the material.
For example, one cubic foot of down feathers is pretty light. One cubic foot of water is about 65 pounds.
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Cubic feet is a measure of volume (i.e. a cube measuring one foot x one foot x one foot). Pounds is a measure of weight (mass). Therefore the relationship between cubic feet and pounds is called density (lbs per cubic foot) and will vary for each substance: a gas (at atmospheric pressure) will have less than one pound per cubic foot, while a block of wood will have a density of approximately 60 lbs per cubic foot.
Roughly about 30 pounds per cubic foot, so 2 cu ft is about 60 pounds
Without knowing a cubic foot of WHAT- there is no way to answer your question.
To convert inch-pounds to foot-pounds, you divide the number of inch-pounds by 12 since there are 12 inches in a foot. Therefore, to convert 105 inch-pounds to foot-pounds, you would divide 105 by 12, which equals 8.75 foot-pounds.
Find the volume of the pool (in cu ft) and multiply by the number of gallons of water per cubic foot. Volume = 9x13x3 = 351 cu ft 351 x 7.481 (gal per cu ft) = 2625.831 gal