Question 1133090
<pre>
            SPEED      TIME         DISTANCE

PLANNED        r        2&1/2          d

FASTER        r+20     2&1/2-1/2       d
</pre>

<pre>
            SPEED      TIME         DISTANCE

PLANNED        r        2&1/2          d

FASTER        r+20        2            d
</pre>

{{{(2&1/2)r=2(r+20)}}}---------solve this equation.