Question

3 Solve the problem. Show your work. Khan uses 78 feet of fence to make a rectangular pen for his pet rabbit. The length of the pen is 25 feet. What is the width of the rectangular pen?

Answer 1

We will solve as follows:

*We will have that the following function models the perimeter of the rectangle:

`2l+2w=78`

Here l is the length and w is the width. Now, we replace l and solve for w:

`\Rightarrow2(25)+2w=78\Rightarrow2w=28\Rightarrow w=14`

So, the width is 14 ft.