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Sunita's age and her son Arnav's age are in the ratio 7 : 2 today. Five years from now the ratio will be 8 : 3. How old is Sunita now (in years)?

Competition practiceRatio, Proportion & Mixtures

A35
B30
C40
D28

Step-by-Step Solution

Let the ages be

7 x

and

2 x . (7 x + 5) / (2 x + 5) = 8/3

gives

21 x + 15 = 16 x + 40

, so

x = 5

. Sunita is

7 \times 5 = 35

years old.

Answer: A) 35

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