Question 1187999
John, Jones, Peter ?
from city A to city be in three hours?

??

<pre>
PERSON           SPEEDS           TIMES        DISTANCE

J                 r               3            (r)(3)

PETER            r+20             2           (r+20)(2)
</pre>

If those distances are the same value then  {{{3r=2(r+20)}}}
-
{{{3r=2r+40}}}

{{{r=40}}}

{{{highlight(3*r=120)}}}