Question 1034699
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A and B can paint a wall in 3 days. A can do it alone in 5 days. how many days would it take for B alone?
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<pre>
The rate of A+B is {{{1/3}}} of the job-per-day.
The rate of A   is {{{1/5}}} of the job-per-day.

Hence, the rate of B is {{{1/3-1/5}}} = {{{5/15-3/15}}} = {{{2/15}}} of the job-per-day.

<U>Answer</U>. It will take {{{15/2}}} = {{{7}}}{{{1/2}}} for B to complete the job working alone.
</pre>

You can find many other similar solved joint-work problems 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 you will learn how to solve such problems once and for all. 


Read them to get trained in solving joint-work problems.