SOLUTION: Mark can finish a task alone in 24 days while Andres can do the same task in 18 days. If they work together, how long can they finish the task?

Question 1093328: Mark can finish a task alone in 24 days while Andres can do the same task in 18 days. If they work together, how long can they finish the task?

Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
.

Mark makes  of the work per day. It is his rate of work.

Andres makes  of the work per day. It is his rate of work.

Working together, they make  =  =  of the work per day.


Hence, it will take  =  days for them to complete the job working together.

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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.

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