You need a 3 rd figure to get volume.
30 gallons is 4.01 cubic feet.
There are 4.01 cubic feet in 30 gallons.
The question is ambiguous. Do you mean how many cubic feet are in a sphere with radius of 30 feet?
How many imperial gallons is 30 cubic feet of water?
30 liters are equal to 1.06 (1.05944) cubic feet.
27 cubic feet is about 764.55 liters.
6 inches = 1/2 foot.27 cubic feet = 1 cubic yard60-ft x 30-ft x 1/2 ft = 900 cubic feet = 331/3 cubic yards
You will need about 30 cubic feet. Your bag should also tell you how many cubic feet are in it.
30 x 33 x 66 = 65,340 (cubic feet).
10,800 cubic feet
9.27 cubic feet
The volume of this room is 7,200 cubic feet. (30 x 30 x 8 = 7,200)