Question

Sara wants to trim a lampshade with braid. the lampshade is shaped like a rectangular prism. the length of the base of the lampshade is 4 inches greater than its width. if the perimeter of the base is 54 inches, find the length of the base.

Answer 1

15.5 inches

Explanation:

Let the width be
`w` and the length be
`w+4`.

Using the formula for the perimeter of a rectangle,

`2(w+w+4)=54 \\ \\ 2w+4=27 \\ \\ 2w=23 \\ \\ w=11.5 \\ \\ \implies w+4=15.5`