Question

IB exams

The area of a rectangle plot is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the plot?

Answer 1

let the breadth of plot be x 
the length will be 15x/100 more that is -:  x+ 15x/100
                                                       =   23x/20
now area=lb
             :(x)(23x/20) =460 (given)
solving the equation we get 
x= 20m
hence the breadth is  20m

Answer 2

Let breadth =x met.

Then length =(115x/100)met.

=x∗115x100=460

x^2=(460x100/115)

x^2=400

x=20