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    Question

    A and B can complete a work alone in 20 days and 60 days

    respectively. They began the work together but A left the work after some days and B completed the remaining work in 12 days. After how many days from the beginning A left the work? 
    A 15 days Correct Answer Incorrect Answer
    B 10 days Correct Answer Incorrect Answer
    C 9 days Correct Answer Incorrect Answer
    D 12 days Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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