Question

if the length of rectangle is increased by 40% and breadth decreased by 40%. what will be the change in its perimeter​

Answer 1

Step-by-step explanation:

let the length be x and breadth be y.

perimeter=2(length+breadth) =2(x+y)

now,

new length=(x+40%)

new breadth=(y-40%)

new perimeter=2(x+40%+y-40%)=2(x+y)

So, there's no change in perimeter.