Question 1048489
Travel Rates Rule for constant rate, RT=D relates rate, time, distance.


<pre>
                    RATE       TIME      DISTANCE
STRAIGHT            r+20        2
WINDING             r           3
Total                                     250
</pre>

Use the basic rule to fill the missing information in the table.  

<pre>
                    RATE       TIME      DISTANCE
STRAIGHT            r+20        2        {{{(r+20)*2}}}
WINDING             r           3        {{{(r)(3)}}}
Total                                     250
</pre>


There is a sum to give you an equation, for the distance.


{{{(r+20)*2+3r=250}}}
and as formulated here, the question asks for a solution of r.