The present ages of $A$ and $B$ are as $6:4$. Five years ago their ages were in the ratio $5:3$. Find their present ages.
Solution:Option(C) is correct
Go from the choices
Choice (C) 30 and 20 are in the ratio of $6:4$
Five years ago their ages would be 25 and 15 which are in the ratio $5:3$.
Hence choice (C) is the right answer.
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