Question 1185052
The parts of trip are in two different parts.

140 minutes is 120 minutes plus 20 minutes, which is 2 hours 30 minutes
( or, two and one-third hours )
<pre>
              SPEEDS     TIME hour     DISTANCE

part1          r         5/r             5

part2         r-2        6/(r-2)         6

TOTAL                  {{{2&1/3}}}
</pre>

You see what equation you can form?

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