Since the volume of a cube is equal to the length cubed,
![V= x^{3]](https://img.qammunity.org/2017/formulas/mathematics/middle-school/6s9037d54edctzmy7wp76xp79seideblft.png)
. Substitute 125 for V giving you

. Take the cubed root of 125 to give you

. To find the area of a side, you have to take the length and square it. Therefore,

. Substitute 5 for x giving you

. Evaluate the equation to give you

.