Question

The length of a rectangle is 3 times its width. The perimeter of rectangle is 72 meters. Find the dimensions of the rectangle.

Answer 1

l = 3w,
P = 2(l+w)=72,

2(l+w)=72,
2(3w+w)=72,
2(4w)=72,
8w=72,
w=9. ***

l=3w,
l=3(9),
l=27. ***