Question

Find the side of a square whose perimeter is $30cm$.

Answer 1

A square has four equal sides.

So perimeter of a square $p=4a$

Where $a$ is he length of any one side of the square.

Given $p=30cm$

$\Rightarrow 4a=30$

$\Rightarrow a=\frac{30}{4}=7.5cm$

Area of a square A$=a^2$

$\Rightarrow A={\left(7.5\right)}^2=56.25$

Therefore,

We get $=56.25c{m}^2$