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If A : B = 4 : 7 and B : C = 5 : 9 then A : B : C is :

 If A : B  = 4 : 7 and B : C = 5 : 9 then A : B : C is :

     a) 20 : 35 : 63    b) 35 : 36 : 63         c) 30 : 35 : 65  d)25 :34: 68















. Expl : A : B = 4 : 7

    B : C = 5 :9  = 5*7/5 : 9 *7/5 = 7 : 63/5

    A : B : C =  4 :  7 : 63/5 =  20 : 35 : 63
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