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Kiran's and Omkar's present ages are in the ratio 3 : 5. Ten years from now the ratio will be 5 : 7. How old is Kiran now, in years?

Competition practiceRatio, Proportion & Mixtures

A15
B25
C20
D12

Step-by-Step Solution

Let the ages be

3 x

and

5 x . (3 x + 10) / (5 x + 10) = 5/7

gives

21 x + 70 = 25 x + 50

, so

x = 5

. Kiran is

3 \times 5 = 15

years old.

Answer: A) 15

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