Question

The perimeter of a square in 20 CM. find its area

Answer 1

perimeter of a square=4 × side
20=4×side
$side = \frac{20}{4}$
side is 5 cm

$area \: of \: square = {side}^{2} \: or \\ \: side \times side$
=5cm×5cm
$= 25 {cm}^{2}$
is the answer

Answer 2

perimeter of a square =4a
20=4a
a=5cm
Area of square = a*a
=5*5
=25cm2