The length of a rectangle is 5 less than thrice the width. If the length is increased by 10% and the width is decreased by 15%, what will be the percentage change in the perimeter, if any?

Answer 1

Plug in numbers,

W=5

L= 10

P=30

new length and width

W=4.25

L=11

P=30.5

pct increase is 1.67%