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the copy machine in your office can produce 22400 copies in 7 hours.How many copies can it produce on 21 hours?
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the copy machine in your office can produce 22400 copies in 7 hours.How many copies can it produce on 21 hours?

User Rao
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22,400 copies in 7 hours means 22,400/7 copies in 1 hour.
Number of copies in 21 hours is 22,400/7 x 21 = 67,200 copies
User Kontiki
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