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Mathematics, 25.07.2019 08:00 lychee1406
If a can do a piece of work alone in 7 days and b can do it alone in 4 days, how long will it take the two working together to complete the job?
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Can someone me with this problem . show your work .
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If a can do a piece of work alone in 7 days and b can do it alone in 4 days, how long will it take t...
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