Question

The breadth of a rectangle is 4 m less than its length. If the perimeter of the rectangle is 40 m, find the length and breadth of the rectangle.​

Answer 1

Explanation:

let the length of rectangle be x

let the breadth of rectangle be x - 4m

the perimeter of rectangle=40m

solution,

perimeter of rectangle=40m

2(l+b)=40m

2(x+x-4)=40m

2(2x-4)=40m

4x-8=40m

4x=40+8

or,4x=48

or,x=48/4

•°•, x=12

so,

length of rectangle=x=12

breadth of rectangle=x-4

= 12-4

=8