Question

if the side of a square is increased by 8 centimetre then its area is increased by the 120 square centimetre what is the side of the square​

Answer 1

let side of square be x

new side =(x+8)cm

According to question

(x+8)^2 =x^2. +120

x^2 +16x+64. =x^2 +120

16x+64=120

16x=56

x=4.5

Side of square is 4.5 cm