Question 1065527
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Kian can paint a wall in 9 hours, if Audrey helped the job is done in 6 hours, how many hours it will taked if Audrey worked alone?
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<pre>
Kian paints {{{1/9}}} of the wall surface per hour.

Together with Audrey, they paint {{{1/6}}} of the wall surface per hour.

Now it is clear that Audrey, working alone, paints {{{1/6-1/9}}} = {{{3/18 - 2/18}}} = {{{1/18}}} of the wall surface per hour.

Hence, it will take 18 hours for Audrey to paint the wall, if he works alone.
</pre>

SOLVED.



There is a wide variety of similar solved joint-work problems with detailed explanations in the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Rate-of-work-word-problems/Word-problems-WORKING-TOGETHER-by-Fractions.lesson>Using Fractions to solve word problems on joint work</A>,

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Rate-of-work-word-problems/Solving-more-complicated-word-problems-on-joint-work.lesson>Solving more complicated word problems on joint work</A>,

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Rate-of-work-word-problems/Selected-problems-from-the-archive-on-joint-work-word-problems.lesson>Selected joint-work word problems from the archive</A> 

in this site.


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

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.


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



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