A boat is at anchor. There is a rope ladder hanging over the side of the boat, and the rungs of the ladder are a foot apart. The sea is rising at a rate of 15 inches per hour. After 6 hours, how much of the rope ladder will remain above the water, assuming that 10 feet of the ladder was above the water when the tide began to rise?
If you have not tried to solve it, have a go now. For everyone else the answer is after the break….
Since the boat is afloat, the water level in relation to the ship stays the same. Therefore, 10 feet of the ladder always shows above the water! Did you solve it?
I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.