Question

What is the area of square whose perimeter is 20 units

Answer 1

area of square= sidesquare
                        =20square
                        =400
   

Answer 2

let the square be of each side a
then as we know that perimeter of square is 4×side
so, 4a=20
therefore, a=5 units

now as we know that area of square is (side)^2

so, 5^2 = 25 square units