Question 1123816
Notice distance is kilometers but the speeds given are in METERS per SECOND.  Decide which speed unit you need for your result and convert whatever this requires.


1 kilometer is 1000 meters.
60 seconds is 1 minute.
60 minutes is 1 hour.


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{{{596(m/s)(1/1000)(km/m)*3600(s/hour)}}}

{{{596(36/10)}}}

{{{596(18/5)}}}

{{{2145.6(km/hour)}}}{{{speed}}}{{{going}}}

-

{{{894(18/5)}}}

{{{3218.4(km/hour)}}}{{{speed}}}{{{returning}}}

-


Total Distance, {{{2*514=1028}}} kilometers


Total Time, {{{514/2145.6+514/3218.4}}} hours
or  0.3993 hours.


Average Speed:
{{{1028/0.399267}}}

<b>2570 kilometers per hour</b>, to three significant figures