Question : A 252 m long train is running at a speed of 125 km/h. What is the time (in seconds) in which it will pass a man who starts from the engine running at the speed of 17 km/h in the same direction as that of the train?
Option 1: 7.6
Option 2: 8
Option 3: 8.4
Option 4: 6.4
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Correct Answer: 8.4
Solution : Given: A 252 m long train is running at a speed of 125 km/h. The speed of the man is 17 km/h. They are going in the same direction. So, their relative speed is (125 – 17) = 108 km/h = 30 m/s So, the train will cross the man in $\frac{252}{30}$ = 8.4 seconds Hence, the correct answer is 8.4.
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Question : A 240 metre long train passes a telegraph post in 16 seconds. What is the speed of the train?
Question : A passenger train running at the speed of 80 km/h leaves the railway station six hours after a goods train leaves and overtakes it in four hours. What is the speed of the goods train?
Question : A train of length 100 metres crosses another train of length 150 metres, running on a parallel track in the opposite direction, in 9 seconds. If the speed of a train having a length of 150 metres is 40 km/h, then what is the speed (in km/h) of the other train?
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