September 2018 1 23 Report
Sebuah mobil bergerak dijalan lurus. selama 30 menit pertama, mobil mnmpuh jarak 33km.1 jam berikutnya jarak yg di tmpuh 60km, sedangkan 30 menit terakhir mobil menempuh jarak 31 km. berapakah kecepatan rata rata mobil tersebut?

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