Question 1090275
<pre>
                   SPEED            TIME          DISTANCE
WILLIE              r               2+1            d
KATHRYN            r+15             2              d
</pre>


Catch-up distance was equal for both of them.  Kathryn's time given.


{{{system(3r=d,2(r+15)=d)}}}


{{{3r=2(r+15)}}}
{{{3r=2r+30}}}
{{{highlight(r=30)}}}