Problems on Trains · Question 12 · Hard
Problems on Trains question 12
A train overtakes two people walking in the same direction as the train at 2 km/h and 4 km/h, taking 9 seconds and 10 seconds respectively. What is the speed of the train?
- 36 km/h
- 24 km/h
- 20 km/h
- 22 km/h
Answer and explanation
Answer: D. 22 km/h
Explanation: Let the speed be v km/h. Length = (v − 2) × 5/18 × 9 = (v − 4) × 5/18 × 10, so 9v − 18 = 10v − 40 and v = 22 km/h (train length 50 m).
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