Multiple choice

The questions given below contain three statements giving certain data. You have to decide whether the data given in the statements are sufficient for answering the question ? At what time will the train reach city ‘X’ from city ‘Y’? I. The train crosses another train of equal length of 200 m running in opposite direction in 15 seconds. II. The train leaves city ‘Y’ at 7.15 am for City ‘X’ situated at a distance of 560 km. III. The 200 m long train crosses a signal pole in 10 seconds.

  1. Only II and III

  2. Only I and III

  3. Only I and II

  4. All

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

III gives train length = 200 m and time to cross pole = 10 s, so speed = 20 m/s = 72 km/h. II gives departure time (7:15 am) and distance (560 km). Time = distance/speed = 560/72 ≈ 7.78 hours ≈ 7 hours 47 minutes. Arrival ≈ 3:02 pm. Statement I about another train is unnecessary. A is correct.

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