Question 1039972
Time difference was 1 hour, and the travel times are unknown.  Tim reached the destination first and this means his speed was faster than Sam's.  Tim's travel time was one hour longer.

<pre>
PERSON       SPEED        TIME      DISTANCE
Sam          r+k          t          375
Tim          r            t+1        375
</pre>


Not enough information.  Three unknown variables but only information for two equations.