Question 1064882
<pre>
             SPEED      TIME      DISTANCE

On Foot      6          5/6         5

By Car       r          5/r         5

Total                 5/6+5/r      10

</pre>
Distance divided by time is rate.
{{{10/(5/6+5/r)=10.8}}}



{{{(5/6+5/r)(10.8)=10}}}


{{{1/6+1/r=5/27}}}


Multiply left and right by 54r.

{{{9r+54=10r}}}

{{{highlight(r=54)}}}