Question

The perimeter of one face of a cube is $20cm$. Find the volume of the cube.

Answer 1

Let $a$ be the edge of the cube.

Perimeter of one face $=4a=20cm\left(\text{Given}\right)$

$\Rightarrow a=\frac{20}{4}=5cm$

Volume of the cube

$=a^3={\left(5\right)}^3=125{cm}^3$