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One Printer Can Do a Printing Job in 9 Hours 52235 \frac{2}{23}

Question 9

Multiple Choice

One printer can do a printing job in 9 hours. Another printer can do the same job in 13 hours. How long can they do the job working together?


A) 52235 \frac{2}{23} hours

B) 57225 \frac{7}{22} hours

C) 122\frac{1}{22} hours

D) 291429 \frac{1}{4} hours

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