At 8.30 am,Jenny and Alan started walking from Town A towards Town B,each at their own constant speed.

I knew you were fast at math, Alan. However, I had no idea you were also a speed walker!

Alan walks 30km farther than Jenny for each hour they walk. And since they both walk for 3 hours, then at the end of that time, Jenny must be 90km behind, i.e., 90km from Town B.

It appears that another factor must have slowed "Jenny's" progress.......a change in gender somewhere along the way........since at 11:30......"Jenny" is now "Jimmy."

I did notice that too Chris but it may not have been a gender change maybe just a quick change of name - Maybe a border was crossed and Jenny I mean Jimmy was a wanted man I mean woman er I don't know what I mean,  Neither does Jinny.