Jawabanmu

2014-09-05T20:52:32+07:00
2014-09-05T21:00:54+07:00
Dik
ket :
1 km = 1000 m
1 jam = 60 menit
1 menit = 60 detik 

V = 10 km /jam = 25 / 9 m/s
t = 30 menit =  1800 s
s = ?


s = V . t
s = 25/9 m/s . 1800 
s = 5000 m = 5 km


semoga membantu ^_^