Jawabanmu

2014-08-20T19:56:56+07:00
Jawaban paling cerdas!
2014-08-20T19:57:23+07:00
1 km = 1000 meter
1 jam = 3600 detik
berarti :
72 km = 72.000 meter
1jam = 3600
72.000/3600 = 20
JADI JAWABNYA 20 m/dt
4 2 4