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Waktu = 2jam15mnt = 2jam 15/60 = 2 1/4 jam = 9/4 jam
Kecepatan = 45 : 9/4
= 45 x 4/9
= 20 km/jam
kec= 45÷9/4=45*4/9=………
hitung sendiri ya hsl akhirnya