Question 1134245
.
<pre>
The return trip was 40 km/h * 6 hours = 240 kilometers long.


So, one way distance is 240 kilometers.


Thus the "trip there" is 240 kilometers, too.


Hence, the "trip there" took  {{{240/60}}} = 4 hours.     <U>ANSWER</U>
</pre>


You should know NOTHING above the "common sense" to solve this problem.