Jawabanmu

2014-09-10T20:01:06+07:00
72x1000=72000
jam ke menit=3600
72000/3600=20m/s
1 5 1
2014-09-10T20:04:52+07:00
72 km/jam = 72 x 1000 = 72.000
1 jam = 3600 s.
Maka, 72000 m/3600s = 20 m/s