SOLUTION: One printing press can print an order of advertising brochures in 5.5 hr. Another press can do the same job in 6.5hr. How long will it take if both presses are used?
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Question 517960: One printing press can print an order of advertising brochures in 5.5 hr. Another press can do the same job in 6.5hr. How long will it take if both presses are used?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
If A can do a job in x time periods, then A can do 
of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do 
of the job in 1 time period.
So, working together, they can do
of the job in 1 time period.
Therefore, they can do the whole job in:
time periods.
John
My calculator said it, I believe it, that settles it
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