The present ages of A and B are in the ratio 6:4. Five years ago their ages were in the ratio 5:3. Find their present ages.

30,20

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20,30

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36,24

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18,12

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none

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Solution

The correct option is A
30,20

Let 6x and 4x be the present ages. $\frac{6 x - 5}{4 x - 5} = \frac{5}{3}$
So x=5
So their present ages are 30 and 20 respectively.

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