Jawabanmu

2014-09-03T13:37:52+07:00
72 km/jam=....m
72x1000=72.000
1x3.600= 36.000
jadi, 72.000:3600=20 m
2014-09-03T13:51:20+07:00
72 km = 72000 m
1 jam = 3600 sekon
jadi dalam satuan SI = 72000 m/3600 s = 20 m/s