Jawabanmu

2014-06-03T14:14:55+07:00
288 km = 288.000 m, 1 jam = 3600s
288 km / jam = 288.000/ 3600 = 80 m / s
2014-06-03T14:19:52+07:00
Km jadiin m = 288000
jam jadiin detik = 3600
28000/3600 = 80