SOLUTION: The office-jet printer can copy Sue's dissertation in 16 min. The Laser-jet printer can copy the same document in 8 min. If the two machines work together, how long would they take

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Question 338328: The office-jet printer can copy Sue's dissertation in 16 min. The Laser-jet printer can copy the same document in 8 min. If the two machines work together, how long would they take to copy the dissertation?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I just answered this exact question not ten minutes ago. Here it is again if you missed it the first time.

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