Question

Area of the square is $100c{m}^2$
Its perimeter is ___ cm.

Answer 1

Area = Side $\times$ Side
$\Rightarrow$ 100 = 10 cm $\times$ 10 cm
$\Rightarrow$ Side = 10 cm
Now, perimeter = 4 $\times$ Side = 4 $\times$ 10 cm = 40 cm