Volume required = pi*r2*h = pi*32*16 = 452.4 cubic feet
about 71 cubic metres of gravel i think
cylinder 18 feet diameter x 1.5 feet deep volume = 381 cubic feet
218.75 cubic feet or 8.1 cubic yards
885 gallons.
18.6240 yd³
3467
a 4 feet diameter tank holds 94 gallons/foot. Therefore 94 x 3 =282 gallons
Approx 642665 US gallons.
29.45 cubic feet or 183.45 US gallons.
If the raised garden has dimensions of 5 x 5 x 1 then it requires 25 cubic feet of dirt to fill it.
23 yards
32