Direction: Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and Read both the statements and give answer
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A train crosses a signal post in X sec. What is the length of the train?
I. The train crosses a platform of 100 m in Y sec.
II. The train is running at the speed of 80 Km/h.
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- If the data in statement I alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
- If the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question
- If the data either in statement I alone or in statement II alone are sufficient to answer the question.
- If the data even in both statements I and II together are not sufficient to answer the question.
- If the data in statement I alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
Correct Option: C
Let, the length of the train be ‘d’ m.
| Speed of train = | X |
I. We know that when a train crosses a platform, it crosses not only its length but also the length of the platform.
| i.e., | d | = | d + 100 | ⇒ d = | 100X |
| X | Y | Y - X |
| II. Length of the train (d) = 80 × | 5 | X = | 200X |
| 18 | 9 |
Therefore, either I alone or II alone is sufficient to answer the question.
