Question

the area of a small rectangular plot is 84 m2 .if the difference between its length and the breadth is 5 m ..find its perimeter

Answer 1

let length be l and breath be b
ACC to question
l-b=5
l=5+b
area of rectangle= 84
l*b=84
(5+b)b=84
b^2+5b-84=0
u can split it using spilliting the middle term and find b=7.
the l=12.
perimeter=2(l+b)
=2*19
=38