Question

The width of a rectangle is one third of the length. If the perimeter is 96 cm, what is the width?

Answer 1

`w=12`

Explanation:

Let `w` be the width and `l` the length.

Then

1) `w=1/3l->l=3w`
2) `2(w+l)=96->w+l=48`

Let's substitute `l=3w` in `w+l=48` and get:

`w+3w=48->4w=48->w=12`