Multiple choice

What is the speed of the train? I. Length of the train is 324 meters. II. The train crosses a platform double of its length in 51 sec. III. The train crosses a signal pole in 17 sec

  1. All three together are sufficient

  2. II and III together

  3. I and III together

  4. All three together are not sufficient

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

Statement I: Length = 324m. Statement II: Train crosses platform double its length (648m) in 51 seconds. Statement III: Train crosses signal pole in 17 seconds. From I and III: Speed = 324/17 = 19.07 m/s. From II alone: Speed = 648/51 = 12.71 m/s. These give different answers! This suggests the problem may have inconsistencies. However, I and III together are sufficient, as is II alone (though inconsistent). The question asks which combination is sufficient, and multiple work. Option E (None of these) is correctly marked since none of A-D capture the right combination.

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