2。 ( 1)。 At this time, another car needs to travel 3* 15=45KM, and the required time is 45/60=3/4 hours, that is, 45 minutes, so it is impossible to get to the big examination room before the deadline for entering the examination room.

(2) Send the four people on the bus out 13KM first, then let them get off and go, and the vehicle will come back to pick up another group of people.

In this way, the time required by the first group of people is 13/60+2/5=37/60 hours, which is 37 minutes.

The return distance of the vehicle is 1 1KM, and the time from departure to return is

(13+11)/60 = 2/5 hours, and the latter part of the people walked 5*2/5=2KM in 2/5 hours, and just met, which took 37 minutes.