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The ratio of the present ages of A and B is 4 : 5. After 8 years the ratio becomes 6 : 7. Find the present age of A (in years).

Competition practiceRatio, Proportion & Mixtures

A16
B24
C12
D20

Step-by-Step Solution

Let ages be

4 x

and

5 x

;

(4 x + 8) / (5 x + 8) = 6/7

gives

x = 4

, so

A = 4 \times 4 = 16

years.

Answer: A) 16

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