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Mathematics, 19.02.2021 04:10 sweetcandy16gaming

jane takes 4 hours to do a job that Alice can do in 3 hours. if jane works 1/2 hour before Alice joins her, how long will it take the two of them to finish the job

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jane takes 4 hours to do a job that Alice can do in 3 hours. if jane works 1/2 hour before Alice joi...
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