chestnutbrown chestnutbrown

22-02-2016
Mathematics

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a copy machine makes 60 copies per minute. a second copy makes 80 copies per minutes. the second machine starts making copies 2 minutes after the first machine starts. both machine stop making copies 8 minutes after the first machine started . together, the 2 machine made how many copies?

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Аноним Аноним

22-02-2016

8minutes-2minutes=6minutes
6×80 copies = 480 copies

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