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Mathematics, 31.01.2020 16:48 yaboi2018

Kopy kwik has 2 copiers. one can produce a year end report in 20 min. the other can produce the same document in 30 min. how long would it take both machines, working together, to produce the report?

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Kopy kwik has 2 copiers. one can produce a year end report in 20 min. the other can produce the same...
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