Answer :
Final answer:
The length of the pig pen will be 78 feet.
Explanation:
To find the length of the pig pen, we can use the formula for perimeter: P = 2l + 2w. In this case, the width (w) is given as 15 feet. We know that the perimeter (P) is equal to 186 feet. Plugging these values into the formula, we can solve for the length (l).
186 = 2l + 2(15)
186 = 2l + 30
2l = 156
l = 78
Therefore, the length of the pig pen will be 78 feet.