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mobil bergerak selama 2 jam
penyelesaian :
a. jarak A- D = S (AB + BC + CD)
= 25 + 15 + 10
= 50 KM
b. Perpindahan = 27 km
c. Kelajuan rata2 = jarak total / waktu total
= 50/2
= 25 km/jam
d. Kecepatan = Perpindahan/waktu
= 27 / 50
= 0,54 km/jam