Question 1110288
<pre>
                   SPEED      TIME          DISTANCE
PLANE               3r         960/(3r)     960
CAR                 r         960/r         960
DIFFERENCE                     8
</pre>

{{{highlight_green(960/r-960/(3r)=8)}}}
Solve for r and evaluate 3r.


You can take a step,  {{{960/r-320/r=8}}},...