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    Question

    The efficiency of X is 50% of the efficiency of Y. If Y

    can type 180 pages in 45 days, then find the number of days taken by X alone to type 360 pages.
    A 135 days Correct Answer Incorrect Answer
    B 145 days Correct Answer Incorrect Answer
    C 175 days Correct Answer Incorrect Answer
    D 180 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Number of pages typed by Y in 1 day = 180 ÷ 45 = 4
    So, number of pages typed by X in 1 day = 4 × 0.5 = 2
    So, time taken by X alone to type 360 pages = 360 ÷ 2 = 180 days

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