The most compact form for 40 cubic feet is a sphere of radius 2.2 feet. A more easily visualised example may be a cube with sides of 3.42 feet.
However, it could be a cuboid of dimensions 2x2x10 or 1x2x20 or any one of an infinite number of options.
And, of course, it could be in the form of other 3-dimensional shapes.
1 US quart = 0.0334201389 cubic feet 40 quarts X 0.0334201389 quarts/cubic foot = 1.3 cubic feet
40 cubic feet = 299.2 US gallons.
40 cubic feet.
1 cubic yard = 27 cubic feet 1 cubic foot = 0.037 cubic yard (rounded)
40 cubic feet = 1.481 cubic yards.
40 liters is the same as 1.41 cubic feet (rounded).
Volume = 40*8*8.5 cubic feet = 2720 cubic feet
Something measuring 48 feet by 40 feet by 57 feet will have a volume of 48 x 40 x 57 = 109440 cubic feet.
If you mean 50 inches by 40 inches by 77 inches, the volume would be 98.03 cubic feet. If you mean 50 feet by 40 feet by 77 feet, the volume would be 169400 cubic feet.
40 cubic feet equates to about 300 (299.221) US gallons of water.
40 feet x 7 feet x 7 feet = 1960 cubic feet.
10,800 cubic feet