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    Question

    Joey completed the school project in 15 days. How many

    days will Tim take to complete the same work if he is 25% more efficient than Joey?
    A 8 days Correct Answer Incorrect Answer
    B 10 days Correct Answer Incorrect Answer
    C 12 days Correct Answer Incorrect Answer
    D 16 days Correct Answer Incorrect Answer

    Solution

    ATQ, Joey completes work in 15 days. Tim is 25% more efficient, so his efficiency = Time taken is  inversely proportional to efficiency :

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