To get cubic feet you will need a third dimension.
Cubic feet implies length x width x height
There are approximately 224.71 gallons in 30 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.
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)
It is 9*30*2 cubic feet = 540 cubic feet 1 cubic yard = 27 cubic feet so 540 cubic feet = 540/27 =20 cubic yards
There are: 3*2*5 = 30 cubic feet