Problems on Trains · Question 11 · Medium
A 360 m long train running at 72 km/h takes 36 seconds to pass completely through a tunnel. What is the length of the tunnel?
- 720 m
- 360 m
- 400 m
- 300 m
Answer and explanation
Answer: B. 360 m
Explanation: 72 km/h = 20 m/s. In 36 s the train covers 720 m, which equals train length + tunnel length. Tunnel = 720 − 360 = 360 m.
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