<PRE><B>Question 698538</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;This is a pretty standard rate of work problem.&lt;br&gt;

We just need to set up a simple equation.&lt;br&gt;

In words, if Mohan can do 1/20 of the job in 1 day,&lt;br&gt;

and Aman can do 1/30 of the job in 1 day,&lt;br&gt;

what percentage of the job could they do working together in 1 day?&lt;br&gt;

{{{1/20+1/30=1/x}}}&lt;br&gt;

{{{30/600+20/600=1/x}}}&lt;br&gt;

{{{50/600=1/x}}}&lt;br&gt;

{{{50*x=600*1}}}&lt;br&gt;

{{{x=600/50}}}&lt;br&gt;

{{{x=12}}}&lt;br&gt;

This means they could do 1/12 of the work in 1 day.&lt;br&gt;

Thus, working together, Mohan and Aman can do the work in 12 days!&lt;br&gt;

I hope this helps!  Keep practicing!  :)&lt;br&gt;

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