Matematika

Pertanyaan

a:c=5:4,b:d=2:3,jika c*d=18 maka a*b =...

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  • jawab
    perbandingan

    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

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