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      Question

      What is the length of the

      train? Statement I: The train takes 35 seconds to cross a platform that is 725 meters long and 6 seconds to pass a stationary tree. Statement II: The train takes 42 seconds to cross a platform that is 900 meters long and 15 seconds to pass through a tunnel that is 225 meters long. The question consists of two statements numbered "l and II "given below it. You have to decide whether the data provided in the statements are sufficient to answer the question.
      A The data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question. Correct Answer Incorrect Answer
      B 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. Correct Answer Incorrect Answer
      C The data either in statement I alone or in statement II alone are sufficient to answer the question. Correct Answer Incorrect Answer
      D The data given in both statements I and II together are not sufficient to answer the question. Correct Answer Incorrect Answer
      E The data in both statements I and II together are necessary to answer the question. Correct Answer Incorrect Answer

      Solution

      ATQ, Statement I: Let, length of train be ‘L’ m So, (L + 725)/35 = L/6 L + 725 = 35L/6 29L/6 = 725,  L = 150 m Statement I alone is sufficient to answer the question. Statement II: Let, length of train be ‘L’ m So, (L + 225)/15 = (L + 900)/42 42L + 9450 = 15L + 13500 27L = 4050,  L = 150 Statement II alone is sufficient to answer the question

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