Question 1050765
How do you measure the trip?  Distance?


Try that.


Constant Travel Rate Rule is as  D/T=R, D for distance and T for time.
{{{T/D=1/R}}}
{{{T=D/R}}}

<pre>
              RATE      TIME     DISTANCE

First          25       {{{d/25}}}       d 

Second          r       {{{d/r}}}        d

Total                  {{{d/25+d/r}}}    2d

AVERAGE        50
</pre>


Average rate is  given and time sum will give  {{{(2d)/(d/25+d/r)=50}}}.
Two variables in one equation but simplification will change that.