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The following questions are accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions. 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. 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.

The following questions are accompanied by three statements (I), (II), and (III). You have to determine which statements(s) is/are sufficient/necessary to answer the questions. 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. 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. Correct Answer Only I and III

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.

Statement I and III is sufficient to answer the question.

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