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Waktu 1 : 2 jam 30 menit = 150 menit
kecepatan 1 : 65 km/jam
Waktu 2 : x
Kecepatan 2 : 75 km/jam
Kecepatan 1 . waktu 1 = kecepatan 2 . waktu 2
65 . 150 = 75 . x
9750 = 75x
x = 130 menit
atau 2 jam 10 menit