It takes 150 seconds from the time the nose of the snake enters the
hole(crosses the entrance)until the nose exits. But the snake is not
considered exited until the entire body clears the exit. Technically,
therefore the proper answer is 150 + 14 or 164 seconds.
The second part statement is somewhat misleading since one could infer that
the snake has just finished entering the hole, as in the first part of the
puzzle. This would make the answer obvious. The second part statement should
then mention that the snake enters the hole until its end, in order to avoid