Multiple choice

Passage

Each of the following questions below consists of a question and two statements numbered I and II given. You have to decide whether the data provided in the statements is sufficient to answer the question.

What is the length of train? I. The train crosses a 120 meters long platform in 15 seconds. II. The train crosses a person walking in opposite direction in 6 seconds.

  1. statement, I alone is sufficient to Answer

  2. statement II alone is sufficient to Answer

  3. Either Statement I or Statement II is sufficient to answer the question

  4. neither statement I nor II is sufficient to answer the question.

  5. Both statements I and II together is necessary to answer the question.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement I: Train crosses 120m platform in 15 sec. This gives (L + 120)/15 = speed, but speed unknown. Statement II: Train crosses a person in 6 sec. This gives L/6 = relative speed, but person's speed unknown. Without person's walking speed, we cannot find L. Both together insufficient.

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