Need to know the depths of the shallow and deep end, and the shape of the pool, whether it is a rectangle or kidney or irregular shaped.
17,953.2 gallons
7500
9,440 gallons.
A 20 Gallon tank can hold up to 20 gallons of water.
Cannot be answered with only these measurements. You need to specify what shape the pool is. Also, for a rectangular pool, the length, width and depth are needed. For a round pool, the diameter and depth are needed.
This pool can hold a maximum of about 9,403 gallons of water.
If 20' is the circumference, then the answer is 833.4 gallons.
This pool can hold up to about 7,181 gallons of water.
17,953.2 gallons
If your measurements are in feet, the 288,000 cubic foot pool would hold 2,154,389.61 gallons of water- and it would be rare to find a pool with a uniform depth of 20 feet.
7500
Ummmmmmmmm I'm not too sure I'm bad at math.
Zero, until you put some water in it. Then ... if the bottom is flat and level ... 224.4 gallons for each inch depth of the water.
9,440 gallons.
Since imperial gallons are no longer in use, I assume that you mean US gallons. 20 x 40 x 5 gives 4,000 cubic feet. 8.33 gallons per cubit foot will give 33,333 us gallons.
10,800
20 gallons of water weighs 167 pounds.