Question

If each side of a square is increased by 4cm then its area is increased by 60 then side of square is

Answer 1

Let the side be x
Therefore, it's area is x^2.
When the side is x+4
Its area is x^2 +60
(x+4)^2=x^2 +60
X^2 +16+8x=x^2 +60
8x=60-16
X=44/8
X=5.5