# The Perimeter of a Rectangular pig pen is 210Ft. The length is 5ft greater then the width. How do you find the Length?

##### 1 Answer

Mar 13, 2016

Length = 55 ft

#### Explanation:

Let length be

Let width be

Perimeter

But we are told that

So, as we need to find length we need to 'get rid' of

Rearranging equation (2) we gave:

Substitute for W in equation (1) gives

Multiply out the bracket

Add 10 to both sides

Divide both sides by 4