Jawabanmu

2014-08-17T12:01:56+07:00
Tinggal dikalikan 1000. 50km/jam = 50.000m/s . 60 km/jam = 60.000 m/s
2014-08-17T12:02:00+07:00
50000km/jam......=50000m/s.....60000km/s