Rising tide
A ship is sailing in high seas.
The tide is rising at the rate of 16 inches per hour.
A ladder is rolled down from the deck.
Four rungs of the ladder are submerged in the water.
Each rung is 1 1/2 inches thick and there is a gap of eight inches between the rungs.
After 5 1/2 hours , how many rungs of the ladder would have submerged?
super puzzle
Quite interesting. I recall it like ladder and snake