Question 1145893
<pre>
Same distance d for running as for walking back


            SPEED         TIME             DISTANCE

RUN           8             d/8               d

WALK          2             d/2               d

TOTAL                         4

</pre>
{{{highlight_green(d/8+d/2=4)}}}


{{{d/8+4d/8=4}}}

{{{5d/8=4}}}

{{{highlight_green(d=32/5)}}}


Time for walking back:
{{{d/2}}}

{{{(32/5)/2}}}

{{{16/5}}}

{{{highlight(3&1/5)}}}
3 hours 12 minutes