1.8/(0.3048x0.3048x0.3048) cubic feet
31,104 cubic inches = 18 cubic feet.
12*15*0.1=18 18 cubic meters
72.1 cubic metres, approx - assuming that the diameter is 18 feet and not some other units.
20 mm = 0.020 meters 18 square meters * 0.020 meters = 0.36 cubic meters
18 US gallons equates to 2.4 (2.40625) cubic feet.
That is 18 cubic ft.
One cubic yard is 27 (33) cubic feet, so 18 cubic yards is 18 x 27 cubic feet.
18 square meters = 193.75 square feet.
18 square meters is the same as 193.75 square feet.
18 x 14 x 12 = 3,024 cubic feet.
18 feet
18 square feet = 1.67 square meters.