Mathematics, 26.10.2019 20:43, Tsumiki

Machine a can sort 840 pieces of mail per hour, and machine b can sort 760 pieces per hour. how long will it take both machines running at the same time to sort 12,800 pieces of mail?
a) 4 hours
b) 6 hours
c) 7 hours
d) 8 hours

Answers: 2

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Machine a can sort 840 pieces of mail per hour, and machine b can sort 760 pieces per hour. how long will it take both machines running at the same time to sort 12,800 pieces of mail? a) 4 hours b) 6 hours c) 7 hours d) 8 hours

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Machine a can sort 840 pieces of mail per hour, and machine b can sort 760 pieces per hour. how long will it take both machines running at the same time to sort 12,800 pieces of mail?
a) 4 hours
b) 6 hours
c) 7 hours
d) 8 hours