25. Matt purchased a 60-foot-long roll of chain-link fence. He used the entire roll of fence to construct a recta agular pen for his dog. Given that the pen is 12 feet wide, what is its length, in feet? A. 5 B. 18 C. 24 D. 36 E. 48

## Step 1<br />The problem involves the use of the Perimeter formula for a rectangle. The Perimeter of a rectangle is given by the formula:<br />### \(P = 2L + 2W\)<br />where \(P\) is the Perimeter, \(L\) is the length, and \(W\) is the width of the rectangle.<br /><br />## Step 2<br />In this problem, Matt used the entire 60-foot-long roll of fence to construct a rectangular pen. This means that the Perimeter of the rectangle is 60 feet.<br /><br />## Step 3<br />The width of the rectangle is given as 12 feet. We can substitute these values into the Perimeter formula to find the length of the rectangle.<br /><br />## Step 4<br />Substituting the given values into the formula, we get:<br />### \(60 = 2L + 2*12\)<br /><br />## Step 5<br />Solving this equation for \(L\), we find that the length of the rectangle is 36 feet.