Solve this riddle?

Question

A fat man and two skinny boys try to sail to an island. The fat man weighs 300lbs and the two skinny boys both weigh 150lbs. They have a boat with a maximum capacity weight of 300lbs. How do all three people get to the island and stay there with the boat on the island from the dock?

Answer 1

They build a bigger boat. In doing so, the fat man also loses weight.

Answer 2

they do it in 5 trips; or the fat guy sails the boat while the two boys get in the water and hang on to the boat

Answer 3

The two boys travel to the second island
One boy stays there while the other boy sails the boat back
The man alone sails to the second island
The boy sails the boat back
Both boys sail to the second island