Question 1157385
.
<pre>

Let x be the rate of work of the slower salesmen in terms of job per day;  

then the rate of work of the faster salesmen is 2x of job per day.


From the condition, we have

    2x + 2(2x) = 1 job,

hence 

    2x + 4x = 1,   or  6x = 1, or  x = {{{1/6}}}  of the job per day   (rate of work of the slower salesmen).


From the other side, working together for 1 day, the two salesmen completed half of the job;
another half remained uncompleted.


So, the time for the slower salesmen to complete this remained half of the job is

    {{{((1/2))/((1/6))}}} = {{{6/2}}} = 3 days.    <U>ANSWER</U>
</pre>

Solved.