Volume = pi*r2*h where r is the radius and h is the height.
So V = pi*4.52*20 = 1272 cubic feet = 9518 US gallons, approx.
A cylinder 50 feet in height and 6 inches in diameter can hold up to 73.44 gallons of water.
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
8.8 gallons of water.
This cylinder can hold up to 66.1 gallons of water.
A cylinder that is 18 feet long and has an inside diameter of 4 feet has a volume of about 1,692 US gallons of water.
17 gallons
A 2' by 15' cylinder will hold up to 352.51 gallons.
It will hold 157.1 gallons of liquid.
This cylinder will hold up to 19.65 gallons of water.
A 3.5' by 4' cylinder will hold up to 287.88 gallons of water.
15.9 gallons
Assuming the dimensions given are inside dimensions, the cylinder will hold 55.75 gallons - less if the dimensions given are outside dimensions.