Mathematics

9 June, 11:11

3. A copy machine makes 60 copies per minute. A second

copy machine makes 80 copies per minute. The second

machine starts making copies 2 minutes after the first

machine starts. Both machines stop making copies

8 minutes after the first machine started. Together, the

2 machines made how many copies?

A. 480

B. 600

C. 680

D. 720

E. 960

+5

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