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Ravi's and Sunil's present ages are in the ratio 7 : 9. Six years ago the ratio was 5 : 7. How old is Ravi now?

Competition practiceRatio, Proportion & Mixtures

A21
B27
C15
D24

Step-by-Step Solution

Let the ages be

7 x

and

9 x . (7 x - 6) / (9 x - 6) = 5/7

→

49 x - 42 = 45 x - 30

→

x = 3

. Ravi is

7 \times 3 = 21

years old.

Answer: A) 21

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