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=3:5
b=1:2
c=1:2
7. (6/7) ×140=120 cm
8. 2+1=3
U. Ayah= (2/3)×45=30 thn
U. Anak= (1/3) ×45=15 thn
9. (1/2) ×3000×5=7.500
10. a.30 cm dan 12 cm
b. 360 cm
a. 15 : 25 = 3 : 5 ( sama² dibagi 5 )
b. 20: 40 = 1 : 2 ( sama² dibagi 20 )
c. 18 : 36 = 1 : 2 ( sama² dibagi 18 )
7)
Dani ==> 6/7 × 140 = 120 cm
8)
2 : 1 ==> 2 + 1 = 3
ayah : anak
Ayah => 2/3× 45 = 30 tahun
Anak => 1/3 × 45 = 15 tahun
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