In a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 30 m/s in the opposite direction. How long does it take for the train to be 180 m away from the car?
A) 2.0 s
B) 3.0 s
C) 6.0 s
D) 9.0 s
E) 18.0 s

Question

Quizplus · Accepted Answer

Since the train and the car are moving in opposite directions, their relative speed is the sum of their speeds, which is 60 m/s + 30 m/s = 90 m/s. To be 180 m apart, the time taken is distance/speed = 180 m / 90 m/s = 2.0 s.

In a Location Where the Train Tracks Run Parallel to a Road