A 100 m long train crosses a man travelling at 5 km/h, in opposite direction in 7.2 seconds, then the velocity of train is____
A. 40 km/h
B. 25 km/h
C. 20 km/h
D. 45 km/h
Answer:D
A 100 m long train crosses a man travelling at 5 km/h, in opposite direction in 7.2 seconds, then the velocity of train is____
A. 40 km/h B. 25 km/h C. 20 km/h D. 45 km/h