Mathematics, 04.08.2019 01:00 maystrenko53

Aperson can copy final exams in 30 minutes using a new copy machine. using an old copy machine the same job takes 45 minutes. if the both copy machines are used. how long will it take to copy the final exams

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Aperson can copy final exams in 30 minutes using a new copy machine. using an old copy machine the s...