Because that is part of the definition of areas and volumes. You can't have a volume in only one or two dimensions, just as you can't have area in only one dimension.
In order to understand that, lets simplify. Area is 2 dimentional, width and height, while volume is 3 dimentional, width, height, and depth.
Whenever you are answering volume questions, it's always units cubed (^3).
Density = Mass/VolumeVolume is not cubed, although the units in which volume is expressedmay be cubed units.
7,238.23 units cubed.
units cubed
1331 cubed units
No - and it's cube units you're thinking of.Some examples:Metres Cubed / Cubic MetresLitresCubic Feet / Feet Cubed
Whenever you are answering volume questions, it's always units cubed (^3).
Yes because volume is measured in cubic units
Density = Mass/VolumeVolume is not cubed, although the units in which volume is expressedmay be cubed units.
The volume of an object.
cubed units
Area is measured in square units. Volume is measured in cubic units. Surface Area- squareunits.
7,238.23 units cubed.
5,575.279763 units cubed.
8 units cubed
the metre cubed
units cubed