Question

The length of a rectangle is 4 cm more than its width. If the perimeter of the rectangle is 64 cm, how do you find the dimensions of the rectangle?

Answer 1

I found `14cm and 18cm`

Explanation:

Call the length `l` and the width `w` so you have:
`l=w+4`
now consider the perimeter `P`:
`P=2l+2w=64cm`
substitute for `l`
`2(w+4)+2w=64`
`2w+8+2w=64`
`4w=56`
`w=56/4=14cm`
use this into the expression for `l` you get:
`l=14+4=18cm`