Question 1086396
<pre>
            SPEED      TIME            DISTANCE
WITH        205+w     900/(205+w)       900
AGAINST     205-w     900/(205-w)       900
Difference               2
</pre>


AGAINST was 2 hours more than WITH time.
{{{900/(205-w)-900/(205+w)=2}}}
Solve this for w, the wind speed.