Darth, it has been explained to you countless times why that's wrong. Instead you tell me that. Seriously? Why not throw in some insult while you're at it, sigh.
1.) I was willing to go for a greather width to drive home the point. But they absolutely look wider than 11m to me. 2ßm at least.
2.) Anyway, why do you think I meant "in a column"? My assumption was that the titans walk away from Paradis into every direction, thus leaving a trail of 600km times 0.002km per day. That's a relatively tiny patch of flattened ground, basically you can easily avoid it.
3.) Now, you seem to think Eren leads all titans in a pulk, which I hadn't though of. But then it still takes a while to flatten an entire country and other countries have more time to prepare. Plus, again, I don't see how Eren can actually achieve killing everybody on the outside. It'd be still rather easy to avoid the titans, and while they'd break all houses and structures, there'd still be nature left/regrow quickly, so there'd be stuff to continue life with afterwards.
Until we see Eren's destruction plan in action (and we might, considering that some regions seem to be doomed already as was said this last episode), I'm doubtful about its viability in actual execution.