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waktu = t = 1 jam 12 menit = 1 jam + 12/60 jam = 1+0,2 jam = 1,2 jam
Kecepatan rata-rata
v = s/t = 48 km / 1,2 jam = 40 km/jam
=48000m/72 meni
=48000m/4320detik
=1,2m/sekon