The perimeter of a rectangle is computed as follows:
[tex]P=2(l+w)[/tex]where l is the length and w is the width of the rectangle
Substituting with l = 725 ft, and w = 975 ft, we get:
[tex]\begin{gathered} P=2(725+975) \\ P=2\cdot1700 \\ P=3400\text{ ft} \end{gathered}[/tex]