Problems on Trains · Question 26 · Medium
Problems on Trains question 26
Two trains, 140 m and 160 m long, run in the same direction on parallel tracks. The faster one, at 72 km/h, completely passes the slower one in 60 seconds. What is the speed of the slower train?
- 48 km/h
- 18 km/h
- 60 km/h
- 54 km/h
Answer and explanation
Answer: D. 54 km/h
Explanation: Relative speed = (140 + 160) ÷ 60 = 5 m/s = 18 km/h. The slower train's speed = 72 − 18 = 54 km/h.
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