A man walking at 5 km/h notices a train 100 meters long passing him from behind in 6 seconds. What is the speed of the train? MCQ with Answer and Explanation
A man walking at 5 km/h notices a train 100 meters long passing him from behind in 6 seconds. What is the speed of the train?
A. 70 km/h
B. 65 km/h
C. 60 km/h
D. 75 km/h
Answer: Option B
Solution (By JKSSB Mock Tests)
Relative speed = 100 / 6 = 50/3 m/s = (50/3) * (18/5) = 60 km/h. Since the train passes him from behind (same direction), Relative Speed = Speed of train - Speed of man => 60 = Speed of train - 5 => Speed of train = 65 km/h.
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