  # Find the time taken by the slower train to pass the driver of the faster one.

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Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively.
Find the time taken by the slower train to pass the driver of the faster one. posted Feb 4, 2016

24 seconds

Speeds add up as trains move in opposite direction:
45+30=75 km/hr
The distance is the length of the faster train:
500 m=0.5 km
Time is:
0.5/75 km/km/hr=1/150 hr= 3600/150 sec= 24 seconds answer Jul 29, 2018

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