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    Question

    Efficiency of A, and B are in the ratio of 3 : 4. If

    both can do a work together in 30 days. Find out how much days A will take to complete the work alone?
    A 70 Days Correct Answer Incorrect Answer
    B 80 Days Correct Answer Incorrect Answer
    C 65 Days Correct Answer Incorrect Answer
    D 50 Days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Efficiency ratio of A : B = 3 : 4 Both work together in = 30 days A take = (total of efficiency ├Ч total days)/(A efficiency) => (7 ├Ч 30)/3 = 70 days

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