September 2018 1 63 Report
Andi memacu motornya lurus 150km ke barat selama 3jam, kemudian berbalik ke timur 50 selama 2jam. keceapatan rata rata andi dalam perjalanan tersebut adalah...
a. 10km/jam ke barat
b. 10km/jam ke timur
c. 20km/jam ke barat
d. 20km/jam ke timur
e.30km/jam ke barat
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