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J=117 km
K=117 km÷1jam
=117 km÷jam
=117 km÷jam
=117 km×jam=70,2 km/jam
2.J=19,5 km
K=70,2 km / jam:60=1,17 km / menit
W=19,5 km :1,17 km/menit=16,667 menit=16 menit 40 detik
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