SOLUTION: It takes a printer 15 hours to print the class schedules for all of the students in a college. A faster printer can do the job in 9 hours. How long will it take to do the job if bo
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-> SOLUTION: It takes a printer 15 hours to print the class schedules for all of the students in a college. A faster printer can do the job in 9 hours. How long will it take to do the job if bo
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Question 1153330: It takes a printer 15 hours to print the class schedules for all of the students in a college. A faster printer can do the job in 9 hours. How long will it take to do the job if both printers are used? Answer by ikleyn(52777) (Show Source):
The slower printer makes of the job per hour.
The faster printer can make of the job per hour.
Working together, the printers make + of the job per hour.
+ = = of an hour.
It means, that the two printers will complete the job in hours = hours = 5 hours and 37.5 minutes.
ANSWER. The two printers will complete the job in hours = hours = 5 hours and 37.5 minutes.
