Level
1

There is a ship that has a ladder on one side the side where the lower tip of ladder is just touching the sea water.The length of the ladder is n meters . A sailor recalls that one day when he was climbing the ladder he used to climb 2 meters in one minute then slip 1 meter in another one minute. It took him 9 minutes to climb the ladder. The tide was rising 3 meters every two minutes. Can you figure out when would water reach the top of ladder.

This is a troll problem.