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= 72 menit
jika :
72 menit = 90 km
32 menit = ?
menggunakan cara perkalian silang
jadi : 90 x 32 / 72
: 2880/72
: 40 km
jadi, jika mobil berjalan dalam waktu 32 menit, maka mobil tersebut telah menempuh jarak 40 km.
32 menit = x
dit : x ?
jwb :
1 jam 12 menit = 1,2 jam
32 menit = 0.53 menit
jadi : 1,2 jam = 0.53 jam
90 km x
1,2x = 47,7
x = 47,7 / 1,2
x = 39.75 km