In the last lesson, we learned that the volume (
V) of a rectangular solid
can be calculated by multiplying the
width (
W), length (
L) and height (
H)
of the solid together. The formula is shown below:
V = WLH
Now, a cube is a special form of a rectangular solid because the sides (edges)
of the cube have the same length.
Therefore, if the length of a side of the cube is
L, the width, length and
height will have the length
L.
With this, we can derive the formula for the volume of a cube as shown below:
V = WLH
= L×L×L
= L3
Hence, we have the formula:
V = L3
The math video below will explain more about this formula. Also, you will see
some examples on using it...