a:c=5:4,b:d=2:3,jika c*d=18 maka a*b =...
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a:c=5:4,b:d=2:3,jika c*d=18 maka a*b =...
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1. Jawaban Anonyme
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A : C = 5 : 4 --> C = 4A/5
B : D = 2 : 3 --> D = 3B/2
C D = 18 --> 4A/5 x 3B/2= 18
12 AB /10 = 18
12 AB = 10 x 18
AB = 10 x 18 /12
A B = 15