Question

the length of a rectangle is 6m more than its width.if each of the length and the breadth is increased by 4m ,the area is increased by 80sq.m.find the dimension of the original rectangle

Answer 1

I think it will help you let the width be X metre and length be x + 6M.
new rectangle
width is equals to X + 4
length = 2 X + 4 + 6 = x + 10m
area of triangle = (x+4)(x+10)
80 =X square + 10 X + 4 x + 40
0 = x square + 10 X + 4 x + 40 - 80
0 = x square + 14 x -40
0 = x(x-10)+4(x-10)
I think something is wrong in question but it will solve like this and it is quadratic equation . Im small so I only know easy quadratic equations to solve I thought I can solve but sorry but I will again but not now I'm going to study because my test is tomorrow and still didn't study I've to revise