Jawapan

2015-02-06T22:35:10+08:00
18m/s.
65km multiples 1000 to convert to m,that is 65000m.
1jam multiples 60 to convert to minutes,and multiples 60one more time to convert to second,that is 3600 saat.
65000m divided 3600 saat ,then you will get the answer