Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is:
Pick one.
A) 50 m  B) 72 m  C) 80 m  D) 82 m  E) 92 m
Let the length of each train be x metres.   Then, distance covered = 2x metres.   Relative speed = (46 - 36) km/hr   =(10 x(5/18)m/sec   =	(25/9)m/sec   (2x/36)	=	(25/9)   2x = 100   x = 50.   50 m
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Two trains of equal length are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is: