SOLUTION: Jerry can assemble a computer​ by himself in 60 minutes. Working with an assistant, he can assemble a computer in 50 minutes. How long would it take his assistant to do it wo

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Question 1102958: Jerry can assemble a computer​ by himself in 60 minutes. Working with an assistant, he can assemble a computer in 50 minutes. How long would it take his assistant to do it working alone?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52925)   (Show Source): You can put this solution on YOUR website!
.
Their combined rate of work is  of the job per minute.

     In other words, they make  of the job per minute.


Jerry's individual rate of work is  of the job per minute.

     In other words, he makes  of the job per minute.


Hence, the assistant makes  =  =  of the job per minute.


It means that the assistant needs 300 minutes = 5 hours to complete the job working alone.

Solved.

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It is a 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".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.



Answer by josgarithmetic(39631)   (Show Source): You can put this solution on YOUR website!

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