Question

the length of a rectangle is 15 cm greater than it's breadth.its perimeter is 150 cm.find the dimensions of the rectangle.

Answer 1

let breadth of the rectangle be x
length of the rectangle= x+15
A/Q
perimeter=150
2(x+x+15)=150
4x+30=150
4x=120
x=30
breadth=30
length=30+15=45

Answer 2

Let breadth of rectangle be x
Length of rectangle=15+x
perimeter=150cm
2(l+b)=150
2(15+x+x)=150
15+2x=150/2
15+2x=75
2x=75-15
2x=60
x=30

Breadth of rectangle=x=30cm
Length of rectangle=15+x
=15+30=45cm
length is 45cm and breadth is 30cm.