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Verified answer
1.a. 1 : 5
b. 7 : 5
2.
a. 12 : 4 = 3 : 1
b. k1 = 4(12) = 48 cm dan k2 = 4(4) = 16 cm
c. l1 = 12² = 144 cm² dan l2 = 4² = 16 cm²
3. 120 : 100 = 6 : 5
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