To find the perimeter \( P \) of a rectangle, you can use the formula:
\[ P = 2 \times (length + width) \]
In this case, the length is 60 yards and the width is 40 yards. Plugging in these values:
\[ P = 2 \times (60 + 40) = 2 \times 100 = 200 \text{ yards} \]
So, the perimeter of the rectangle is 200 yards.