Answer:
Time taken for the train to travel 180 m away from the train is 2 sec.
Explanation:
velocity of the train = 60 m/s
velocity of the car = 30 m/s
Relative to the other, each vehicle passes the other with a velocity of
V = 60 m/s + 30 m/s = 90 m/s
If we take the car's speed as the reference speed, the speed of the train will be 90 m/s. Therefore, time taken for the train to travel 180 m away from the car is,
time = distance/speed = 180/90
time = 2 sec