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    Question

    A group of 6 workers can complete a project in 12 days.

    However, due to unforeseen circumstances, 2 workers had to leave after 3 days.How many additional days will it take for the remaining workers to complete the project?
    A 5 days Correct Answer Incorrect Answer
    B 4.5 days Correct Answer Incorrect Answer
    C 5.5 days Correct Answer Incorrect Answer
    D 6 days Correct Answer Incorrect Answer

    Solution

    Total work required: 6 workers × 12 days = 72 worker-days Work done in 3 days by 6 workers: 6 workers × 3 days = 18 worker-days. Remaining work after 3 days: 72 worker-days - 18 worker-days = 54 worker-days. Remaining workers after 3 days: 6 workers - 2 workers = 4 workers. days needed for 4 workers to complete the remaining work: 54 worker-days ÷ 4 workers = 13.5 days. Additional days = 13.5 – 9 = 4.5 days

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