Question:If A : B = 5 : 7 and  B : C = 6 : 11, then A : B : C is: 

A 55 : 77 : 66 
B 30 : 42 : 77 
C 35 : 49 : 42 
D None 

+ Answer
B 

+ Explanation
A : B = 5 : 7
B : C = 6 : 11
        = `6 xx 7/6 : 11 xx 7/6`
        = `7 : 77/6`

`:. A : B : C = 5 : 7 : 77/6`
                   = 30 : 42 : 77

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Mohammad Towhidul Islam

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