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    Question

    In each of the following questions, a question followed by two statements numbered I and II are given. You have to read both the statements and then Give answer

    What is the speed of the boat in still water?

    Statement I. The boat travels at the speed of 12 km/h upstream. Statement II. The boat travels at the speed of 18 km/h downstream.
    A If the data given in statement I alone are sufficient to answer the question, whereas the data given in statement II alone are not sufficient to answer the question. Correct Answer Incorrect Answer
    B If the data given in statement II alone are sufficient to answer the question whereas the data given in statement I alone are not sufficient to answer the question. Correct Answer Incorrect Answer
    C If the data in either statement I alone or in statement II alone are sufficient to answer the question. Correct Answer Incorrect Answer
    D If the data in both the statements I and II are not sufficient to answer the question. Correct Answer Incorrect Answer
    E If the data given in both the statements I and II are necessary to answer the question. Correct Answer Incorrect Answer

    Solution

    From statement I x – a = 12 km/h……………………..(i) From statement II x + a = 18 km/h ……………………(ii) From eq. (i) and (ii), we get ∴ a = 3 km/h & x = 15kmph Hence, data given in both statements are necessary.

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