Jika jarak antara Lumajang dan Tuban 280km. Pak Bayu dapat menempuh jarak tersebut dalam waktu 3 jam 30 menit. Berapa kecepatan rata rata pak bayu?
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Kecepatan rata-rata
[tex] \frac{jarak}{waktu} = \frac{280 \: km}{3,5 \: jam} \\ \\ 80 \frac{km}{jam} [/tex]