Answer:
36 feet.
Explanation:
If the original link is 90 feet long, but the scale is 2.5 inches, you would divide 90 by that second 2.5
That gets you your 36 feet.
A way to check it could be by adding 26 +26, then a half of a 36 (18), since its two wholes and one half (2.5).
I'm pretty sure this is right, and I hope it helped!!