Question 905672
Aircraft carriers are magnificent! If you ever get the chance to tour one, take it.  They're amazing.<br>
The trip back took 4 hours and 6km/hr.  4 * 6 = 24km
The trip there is the same distance, 24km.  But it's divided by 3 hours.  24km/3hours = 8km/hr
The question isn't very good.  <a href=http://www.navy.mil/navydata/ships/carriers/powerhouse/cvbg.asp>An aircraft carrier travels much faster than that</a>, and at 24km out to sea, they aren't even into international waters.