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Verified answer
Jarak = 10 kmKecepatan = 30 km/jam
Waktu tiba = 06.45
Lama perjalanan = jarak/kecepatan
Lama perjalanan = 10 km/30 km/jam
Lama perjalanan = 1/3 jam = 1/3 × 60 menit = 20 menit = 00.20
Waktu berangkat = waktu tiba - lama perjalanan
Waktu berangkat = 06.45 - 00.20
Waktu berangkat = 06.25