It would require 2,937.6 US gallons of water to fill the pipe.
Roughly 81,120 gallons
It would require 74,530 US gallons of water.
615,142 gallons of water are needed to fill this cylinder.
17,953.2 gallons
Depends on the depth of the water. If you go to four feet deep the total would be about 13,594 gallons.
Using 24 feet x 4.5 feet as true measurements it would take 15,220 gallons of water to fill the pool.
It will take 5,104.1 gallons of water to fill this cylinder.
If this is a round pool 18 feet across and you fill it with 4 feet of water, it contains 7,646 gallons of water.
An 18-foot round pool with 3 feet of water contains 5,734.8 gallons of water. If you fill it to 4 feet deep it increases to 7,646 gallons of water.
If you fill it to four feet deep, the total is 10,408 gallons of water.
It depends on how deep the water is. Since it's a fairly small pool, let's say you fill it to 1 foot deep. In that case the total volume will be about 262 gallons of water. If you went to 1.5 feet the gallons would be about 392 gallons and if you filled the pool to 2 feet, the gallons would increase to about 523 gallons.
4 X 12 X 40 = 1920 cubic feet of water. 1 cubic foot of water = 7.48 gallons. 1920 cubic feet of water = 14,362.5 gallons