Jawabanmu

2014-05-08T13:16:49+07:00
Diketahui
s 1 = A-B=20 km
s 2 = B-C=30 km
s 3 = C-D=30 km
t 1 = A-B= 1 jam
t 2 = B-C= 2 jam
t 3 = C-D= 1 jam
jawab
V rata-rata = (s 1 + s 2 + s 3) / (t 1 + t 2 + t 3)
V rata-rata = (20+30+30) / (1+2+1)
V rata-rata = 80 km / 4 jam
V rata-rata = 20 km / jam