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a) kecepatan = jarak / waktu = 117 / 100 = 1,17 km/menit = 1,17 * 60 = 70,2 km/jam
b) jarak2 = 19 1/5 = 96/5 km
menit = (96/5) / 117 * 100 = 96/585 * 100 = 16 menit.