A train 75 m long passes a man, running at 5 km/hr in the same direction in which the train is going...

A train 75 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is?

Quiz

Answer/Solution

32

Steps/Work

Speed of the train relative to man = (75/10) m/sec = (15/2) m/sec. [(15/2) * (18/5)] km/hr = 27 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5 = 27 ==> x
= 32 km/hr.Answer:E

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A train m long passes a man, running at km / hr in the same direction in which the train is going, in seconds. The speed of the train is?

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