Mathematics · Time and Work

Twenty persons take 15 days to complete a certain work, working 8 hours a day. To complete the same work in 4 days, working 10 hours a day, the number of persons required is:

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Twenty persons take 15 days to complete a certain work, working 8 hours a day. To complete the same work in 4 days, working 10 hours a day, the number of persons required is:

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Twenty persons take 15 days to complete a certain work, working 8 hours a day. To complete the same work in 4 days, working 10 hours a day, the number of persons required is:

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