There would be a total of 18.84in3 inside the cylinder.
2 inches = 50.8mm
4 feet 0.5 inches 48.5 inches = 4feet 1/2inch
2 inches is equal to5.08 cm (centimetres)50.8 mm (millimetres)
6ft 2inch is 187.96cm
2inch by 2 inch 2inch by 2 inch
use a piece of 2inch square timber about 12 inches long if for raised beds or as long as you need it to be for anything else then saw an angle on all 4 sides of one end and you have a stake you can drive into the ground ( or a vampire if that's your wish)
24 inches, surely, since the other two lengths given in the question are the height and width!