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One cooy machine can run off copies in 198 minutes. A newer machine can do the same job in 126 minutes. How long does it take the two​ machines, working​ together, to make all of the necessary​ copies?
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One cooy machine can run off copies in 198 minutes. A newer machine can do the same job in 126 minutes. How long does it take the two​ machines, working​ together, to make all of the necessary​ copies?

User Ksarmalkar
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6 votes
This depends on the necessary number of copies.
User Steve Robbins
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