Question

4. 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

Answer:

$38 \: m$

Let the length (L) be is x

Breadth(B)=x−5

area=l×B

=(x)(x−5)  =84

or

=x2−5x−84=0

Solve the equation,we have,

x=12 and x=−7

taking x=12 , we have 

L=12 and B=12−5  =7

Perimeter =2(L+B) 

=2(12+7)

=2(19)  

=38m