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    Question

    A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?

    A 15 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 25 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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