# Baileys rectangular dog pen for his Irish setter must have an area of 400 square feet. Also, the length must be 10 feet longer than the width. How do you find the dimensions of the pen?

##### 1 Answer

May 11, 2016

Width = 15.616 feet, length is 25.616 feet.

#### Explanation:

Start with a sketch of a rectangle. Let

The length is 10 feet longer, so the length is

The area is found from

Make an equation in

Completing the square method probably easiest.