The volume is found by multiplying the dimensions.
9 x 30 x 2 = 540 cubic feet.
9.27 cubic feet
87.5 cubic feet
Assuming you mean a cubic construct that is 24 feet long by 1 feet wide by 2 feet deep, the answer is 48 cubic feet (24x1x2).
60 cubic feet
Noe but it can be filled in with 12 cubic feet of dirt
162 cubic feet.
420
400.
8.333 cubic feet
147 cubic feet of cement are required.
164 cf. (6x9x3)
4.5 x 9 x 1.5 = 60.75 cubic feet
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
(20' x 12' x 4') = 960 cubic feet
It is: 10*7*3 = 210 cubic feet
1 cubic yard = 27 cubic feet12 x 12 x 2 = 288 cubic feet = 102/3 cubic yards
A third dimension is required to allow this calculation. Perhaps the 13 feet deep should be 13 feet wide.