How many seconds will a train of length 380 m take to cross a man walking with a speed of 5 km/hr in the direction of the moving train if the speed of the train is 77 km/hr ?

15 sec

19 sec

24 sec

26 sec

Speed of train relative to man = (77 - 5) km/hr = 72 km/hr. = 72 * 5/18 = 20 m/sec. .'. Time taken to pass the man = (380/20) sec = 19 sec.

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