A train 150 m long is running at a speed of 54 km/h. How long will it take to pass a man standing on a platform?

A. 8 sec
B. 10 sec
C. 12 sec
D. 15 sec

Solution:
Speed = 54 × 1000 / 3600 = 15 m/s
Time = Distance ÷ Speed = 150 ÷ 15 = 10 sec
Answer: B