Question 562950

dimensions = 30 by 20
area = 600 sq.m
let it be increased by x

increased dimensions = x+30, x+20

(x+30)(x+20)= 2*600
x^2+30x+20x+600=1200
x^2+50x+600=1200
x^2+50x-600=0
X^2+60x-10x+600=0
x(x+60)-10(x+60)=0
(x+60)(x-10)=0

x= 10 OR -60

take the positive
x= 10