Mathematics, 15.12.2021 23:50 jahjah1158

A mason can build a wall in 9 hours less than an apprentice. Together they can build the wall in 6 hours. How long would it take the apprentice, working alone, to build the wall?

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A mason can build a wall in 9 hours less than an apprentice. Together they can build the wall in 6 h...

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