Jawabanmu

2014-01-01T20:50:02+07:00
Dik : v = 72 km/jam
Dit : s....?
Jb :
v = 72 km/jam = 72 * \frac{1000}{3600}
                      = 20 m/s
30 menit = 30 *60 s = 1800
s = v.t
   = 20 m/s (1800)
   = 36000 m