<PRE><B>Question 1127768</B>
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During the first part of a trip, Adrian drove 24 miles at a certain speed. 
Adrian drives another 24 miles on the second 
Part of the trip at a speed of 10 mph faster
Driving time for the entire trip was 52 minutes 
Find the rate at which Adrian drive during the first part of the trip
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&lt;pre&gt;
                  SPEED        TIME                DISTANCE

FIRSTPART           r         {{{24/r}}}               24

SECONDPART         r+10       {{{24/(r+10)}}}          24

TOTAL                         {{{52/60}}}
&lt;/pre&gt;

{{{24/r+24/(r+10)=52/60}}}
Simplify and solve this for r.</PRE>