We can represent this as a diagram:
To find the diagonal, we can consider the right-angled triangle:
Using Pythagorean Theorem to find x, we have
[tex]\begin{gathered} x^2=160^2+360^2 \\ x^2=25600+129600 \\ x^2=155200 \\ x=\sqrt[]{155200} \\ x=393.95\approx394\text{ fe}et \end{gathered}[/tex]The length of the diagonal is 394 feet.