Question

The perimeter of one face of a cube is $24$ cm. Find the total area of the $6$ faces in cm${}^2$

Answer 1

Each face of a cube is a square.
Let the side of the square face $=a$ cm
Perimeter of the square $=4a=24$ cm $=>a=6$ cm
Total surface area of a cube of edge a $=6a^2$

So, the total surface area of the cube of edge a $=6$ cm is $=6{\left(6\right)}^2=216{cm}^2$