∵45>42,

∴ Can't arrive at the examination room before entering the examination room;

(2) First, four people will be sent to the examination room by car, and the other four will walk to the examination room at the same time. After arriving at the examination room, the car will return to the meeting place with four other people and then take them to the examination room.

How long does it take to transport four people to the examination room by car?

15

60

=0.25 hours = 15 minutes.

Within 0.25 hours, the other four people left 1.25km, and their distance to the examination room was15-1.25 =13.75 (km).

Suppose the four people who left first met after the car returned to t(h),

5t+60t= 13.75，

Solve t=

1 1

Fifty two

.

The same is true of the time from the bus rendezvous point to the examination room.

1 1

Fifty two

h.

So it takes 15+2× time to send these eight people to the examination room with this scheme.

1 1

Fifty two

×60≈40.4