Solution
Given = A : B = 4 : 5 and B : C = 20 : 11
=> $$\frac{A}{B}=\frac{4}{5}$$ -----------------(i)
and $$\frac{B}{C}=\frac{20}{11}$$ -----------------(ii)
Multiplying equation (i) by '4', we get : $$\frac{A}{B}=\frac{16}{20}$$
Now, the value of B is same in both equation, => A : B : C = 16 : 20 : 11
=> Ans - (C)
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