231 cubic inches = 1 US gallon
Volume of that solid = 36 x 36 x 22 = 28,512 cubic inches = 123.4 gallons.
Note:
That solid is not a cube
8*8*8 = 512 cubic inches.
The volume of a 1 inch cube is: one cubic inch.
ANSWER Are you sure that you mean "hexagon"? If "yes" - you won't have an answer. But may be you mean "cube"? Cube 25x25x25 inches contains 256.05 liters of water
1 cubic cm of water 338.14023 fluid ounces
A two inch pipe can hold 0.1632 gallons per foot. It takes slightly over 6 feet of two inch pipe to hold one gallon of water.
A cylinder with these dimensions will hold up to 13.06 gallons of water.
12*45*59 cubic inches = 31,860 cubic inches
2.75 Imperial gallons.
16foot
A 24-inch diameter cylinder holds 23.5 gallons of water per foot of length/height.
1 and 1/2 gallons
The amount of water that can fit in the given cube.