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It depends when he is out. I think if he reaches 0 he is still in, so it might be wrong, but I bet 28 days. :)

28 days is the correct answer.

Thanks! :)

Yeah, wasn't sure if 30 would count as out or not... :/

27

nope... try bit more harder.

So in 24 hours he only progresses by one meter, on the 27th day he would star the morning at 27 meters meaning that the 3 meter jump he makes that day would get him to the top of the well, but technically not out. So on a technicality I'm going to say 28