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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 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

Your Answer

r speed of the train relative tio man = 125/10 m/sec.
                                                         = 25/2 m/sec
                                                         = (25/2)X(18/5) km/hr
                                                         = 45 km/hr 

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