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Que.  A train 125 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: 
a.  45 km/hr 
b.  50 km/hr 
c.  54 km/hr 
d.  55 km/hr 
Correct Answer:50 km/hr

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