- A72 km/h
- B60 km/h
- C48 km/h
- D30 km/h
Step-by-Step Solution
Running back he covers ; forward he covers — an extra , during which the train covers the whole bridge . Train : man → train km/h.
Answer: B) 60 km/h
A trackman is walking across a railway bridge and is two-fifths of the way across when he hears a train approaching the end behind him. If he runs back towards the train he reaches that end just as the train does; if he runs forward he just reaches the far end as the train does. He runs at 12 km/h. What is the train's speed?
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