Question
15 men working 11 hours a day can finish building a house in 12 days. How long would it take 20 men to finish building the same house if they work the same number of hours a day?
3 m

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15 men working 11 hours a day can finish building a house in 12 days. How long would it take 20 men to finish building the same house if they work the same number of hours a day?