Need help from the CP math whizzes

[Frosty]

I have a new one. It's driving us nuts because it seems straightforward but we are not getting the answer they give so we must be missing something.

On a straight road, an inspecting officer traveled from the rear to the front of an army column, and back, while the column marched forward its own length. If the officer and and the column maintained steady (but different) speeds, what was the ratio of their speeds, faster to slower?

Thanks for any help. Remember - you're doing it for the kids.