Question

Find a side of a cube whose total surface area is $486c{m}^2$.

Answer 1

Let the side of a cube be $acm$

As we know that

total surface area of a cube with side $a$ is $6a^2$

Given total surface area of a cube is $486c{m}^2$

$⟹6a^2=486$

$⟹a^2=81$

$⟹a=9$

So side of a cube is $9cm$