SOLUTION: Bill needs to make a large number of photocopies.Copier 1 alone can make the copies in 4 hours while copier 2 alone can complete job in 3 hours. If Bill runs the two photocopiers a
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-> SOLUTION: Bill needs to make a large number of photocopies.Copier 1 alone can make the copies in 4 hours while copier 2 alone can complete job in 3 hours. If Bill runs the two photocopiers a
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Question 1098431: Bill needs to make a large number of photocopies.Copier 1 alone can make the copies in 4 hours while copier 2 alone can complete job in 3 hours. If Bill runs the two photocopiers at once.how long will it take to complete the job? Answer by ikleyn(52847) (Show Source):
The rate of the Photocopier 1 is of the job per hour, which means that it does of the job per hour.
The rate of the Photocopier 2 is of the job per hour, which means that it does of the job per hour.
When the copiers work together, their combined rate of work is = = of the job per hour.
Therefore, it will take of an hour for two copiers to complete the job working together.
Solved.
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It is a typical joint work problem.
