Question 1145576
<pre>
           SPEED        TIME            DISTANCE

FIRST        36          48/36            48

SECOND       V           48/V             48

Totals                   {{{48/36+48/V}}}       96
</pre>

{{{(48/36+48/V)/96=1/45}}}

-

..
{{{1/36+1/V=2/45}}}

.

.
{{{27V=45*36}}}

{{{highlight(V=60)}}}