A train 100 meters long takes 6 seconds to cross a man walking at 5 km/h in a direction ' opposite to that of the train. Find the speed of the train.
A. 35 km/h
B. 40 km/h
C. 45 km/h
D. 55 km/h
সঠিক উত্তরঃ
D.
55 km/h
Explanation:
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