Problems on Trains · Question 27 · Hard
Problems on Trains question 27
A train passes a man walking at 3 km/h in the same direction in 10 seconds, and a woman walking at 6 km/h towards the train in 8 seconds. What is the length of the train?
- 110 m
- 100 m
- 120 m
- 90 m
Answer and explanation
Answer: B. 100 m
Explanation: If the train's speed is v km/h, then (v − 3) × 10 = (v + 6) × 8, so v = 39 km/h. Length = (39 − 3) km/h × 10 s = 10 m/s × 10 s = 100 m.
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