mohon bantuannya no: 10,11,12. menggunakan caranya

10. harga 1 sak semen: 195.000 : 3 = 65.000
harga 7 sak semen = 65.000 x 7 = 455.000
(d)

10) 3 sak => 195.000
7 sak => x
Perbandingan senilai
3/7 = 195.000/x
3x = 7(195.000)
x = 1.365.000
x = 455.000

11) 135 km => 9 liter
37,5 km => x
Perbandingan senilai
135/37,5 = 9/x
135x = 9(37,5)
135x = 337,5
x = 2,5

Jadi total bensin yg dihabiskan = 9 + 2,5 = 11,5 liter

12) 70 km/jam => 3 jam
x => 2,5 jam
Perbandingan berbalik nilai
70/x = 2,5/3
2,5x = 70(3)
2,5x = 210
x = 84 km/jam