Question
At what time will a train reach city P from city Q?
Statement I: The 600 meter long train crosses a signal pole in 20 seconds. Statement II: The another train crosses a 400 m long platform in 30 secs. Statement III: The train leaves city P at 10:00 am for city Q situated at a distance of 1,620 km.Solution
From I and III, Speed of the train = 600/20× 18/5 = 72 km/hr. Time = 1620/72 = 22*1/2 hrs. Arrival time = 10 am + 22*1/2hrs = 8.30 am. Statement I and III is sufficient to answer the question.
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