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j=k×w
j=45×5/4
j=225:4
j=56,25km
waktu = 02.30-03.45 = 1 jam 15 menit = 1 1/4 jam = 5/4 jam
jarak = kecepatan x waktu
jarak = 45 km/jam x 5/4 jam
jarak = 225/4 km
jarak = 56,25 km