Jawabanmu

2014-08-22T22:08:42+07:00
1) 1km=1000m, 20dam=200m. 2) 108 km/jam
2014-08-22T22:10:45+07:00
1) 1x1000 + 20x10 = 1000+200 = 1200m
2) 30m/s = 30x3600m/jam
              = 108000m/jam
              = 108km/jam