Quantitative Aptitude • Time, Speed & WorkHard
A train 285 m long passes a person walking at 3 km/h in the same direction in 19 seconds. What is the speed of the train?
A. 54 km/h
B. 60 km/h
C. 57 km/h✓ Correct Answer
D. 51 km/h
💡 Solution & Explanation
When both move the same way, the train passes the person at the difference of their speeds. That relative speed = 285 m ÷ 19 s = 15 m/s = 15 × 18/5 = 54 km/h. So the train's own speed = 54 + 3 = 57 km/h. Forgetting to add the walking speed gives 54 km/h.
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