SOLUTION: one printer can do a printing job in 11 hours. Another printer can do the same job in 14 hours. how long can they do the job working together

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Question 1080979: one printer can do a printing job in 11 hours. Another printer can do the same job in 14 hours. how long can they do the job working together
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52824) About Me  (Show Source):
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The rate of work for the 1-st printer is 1%2F11 of the job per hour.

The rate of work for the 2-nd printer is 1%2F14 of the job per hour.

The combined rate of work is 1%2F11+%2B+1%2F14 = 14%2F154+%2B+11%2F154 = 25%2F154.


Hence, it will take 154%2F25 hours for the two printers to complete the job.

Solved.


It is typical joint work problem.

There is a wide variety of similar solved joint-work problems with detailed explanations in this site. See the lessons
    - Using Fractions to solve word problems on joint work
    - Solving more complicated word problems on joint work
    - Selected joint-work word problems from the archive


Read them and get be trained in solving joint-work problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Rate of work and joint work problems" of the section "Word problems".



Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!

one printer can do a printing job in 11 hours. Another printer can do the same job in 14 hours. how long can they do the job working together
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