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Mathematics, 29.07.2019 13:40 antmike31ox1v8e

John can type 2/3 of a manuscript in 12 hours. if he is joined by laura, they can complete the typing in 2 hours. how many hours would laura take to type the manuscript working alone? a. 4.5 hours b. 2 hours c. 2.25 hours

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John can type 2/3 of a manuscript in 12 hours. if he is joined by laura, they can complete the typin...
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