A man sitting in a train travelling at the rate of 50 km/h observes that it takes 9 sec for a goods train travelling in the opposite direction to pass him. If the goods train is 187.5 m long, find its speed.
Explanation:
Distance covered = 187.5m, Time = 9 secs
Relative speed = 187.99×36001000 = 75 km/hr
As the trains are travelling in opposite directions, speed of goods train = 75 – 50 = 25 km/hr
Hence, option (b).
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