Question 1021457
Examine this presentation and compare with your example, and try to solve. 
Note carefully that your example uses equal distance in both directions. 


<a href="https://youtu.be/1Ki0d5-_XWY">travel rates equal times different distances, involve wind</a>


Did it help?  The channel has also another example of travel rates which may yet be helpful.


Some help with the data table, based on travel rates rule RT=D, and implied variable assignments:

<pre>
                     rate          time         distance

WITH WIND           r+w             4            2400

AGAINST WIND        r-w            {{{5&1/3}}}          2400
</pre>