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291 US Gallons agstiadi
15.29 Gals
8.8 gallons of water.
3.9
66 gallons
74.42 gallons.
12,345 gallons
Do you mean a cylinder with a diameter of 5 feet and length of 12 feet? This would hold about 235.6 cubic feet or 1762.5 gallons
One foot of 3 inch pipe will hold approximately 0.625 gallons of water.
A round pool with a 10-foot diameter and a 3-foot depth can hold up to 1,762 gallons of water.
Assuming the dimensions given are inside dimensions, the cylinder will hold 55.75 gallons - less if the dimensions given are outside dimensions.