Question 1164958
d, the distance in one direction OR the other direction.
t, time for returning

<pre>
           SPEED      TIME        DISTANCE
GO          45         4-t         d=45(4-t)
BACK        50          t          d=50t
Total                   4
</pre>
{{{highlight_green(45(4-t)=50t)}}}
Solve that for the time "back"
{{{highlight(t=36/19)}}}


Question asked for {{{2d}}}.

{{{2*50*(36/19)=highlight(189.5)}}}{{{miles}}}