The Jailhouse

[NorthWesterner]

Actually, there was an answer. He found it.

Here's an easier one for you to break in with.

A rope ladder with wooden cross-steps every six inches is hanging over the side of a boat. When the tide is at its lowest, three of the steps are underwater. The tide is coming in at one foot every 45 minutes. In three hours, how many steps of the ladder will be underwater?

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Funny thing, but it seems that the harder I work, the luckier I get.