Why is a solid figure measured in cubic units?
The length, width, or height of a solid figure is measured in
units of length.
The area of the figure's outside surfaces is measured in squared
units of length.
The volume of space filled by the figure is measured in cubed
units of length.
The mass of the figure is measured in units of mass.
The weight of the object is measured in units of force.
The age of the figure is measured in units of time.
etc.