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80 km/jam = x
karna perbandinganya terbalik( semakin cepat lajunya maka semakin sedikit waktu yg dibutuhkan)
jadi..dibalikan dulu baru d kali silang..
90 . 200 = 80 . x
18000 = 80 . x
225 menit = x
300 km/80 = 3,75
375/100=15/4×60 = 15×15=225÷60 = 3 jam 45 menit
#semogabermanfaat#