Question
Efficiency of a man is 25% more than that of a woman. (n + 4) men working 8 hours a day can complete a task in 20 days, whereas (2n - 4) women working 6 hours a day can complete the same task in 25 days. Find the time taken by (n - 2) men and (n - 4) women working 9 hours a day to complete the task.
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