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Mathematics, 09.03.2021 17:20 puppylover72

Janet, an experienced shipping clerk, can fill a certain order in 9 hours. Bill, a new clerk, needs 10 hours to do the same job. Working together, how long will it take them to fill the order?

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Janet, an experienced shipping clerk, can fill a certain order in 9 hours. Bill, a new clerk, needs...
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