At what time will a train reach city P from city Q?
I. The 600 meter long train crosses a signal pole in 20 seconds.
II. The another train crosses a 400 m long platform in 30 secs.
III. The train leaves city P at 10:00 am for city Q situated at a distance of 1,620 km.
From I and III, Speed of the train = 600/20× 18/5 = 108 km/hr. Time = 1620/108 = 15 hrs. Arrival time = 10 am + 15 hrs = 1 am. Statements II and III together is sufficient to answer the question.
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