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Question
If A : B = 5 : 6 and B : C = 9 : 11, find A : B : C.
Sum
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Solution
The common term is $$B$$.
The values are 6 and 9.
The L.C.M. of 6 and 9 is 18.
Multiply $$A : B = 5 : 6$$ by 3 to get $$15 : 18$$.
Multiply $$B : C = 9 : 11$$ by 2 to get $$18 : 22$$.
Therefore, $$A : B : C = 15 : 18 : 22$$.
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