Jawabanmu

2014-09-05T20:02:04+07:00
B.0,8 hm= 80 m
C.72 km/jam= 20 m/s

2014-09-05T20:17:04+07:00
B) 0,8 hm =  80 m
c) 72 km/jam  = 20 m/s
d) 1200 kg/m³ = 1,2 g/cm³