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Arithmetic Aptitude :: Problems on Ages

10. Today, the age of a father is thrice the age of his son. Ater 5 years the age of father will be 2.5 times the age of his son. What is the age of son today?

Answer: Option B

Explanation :

Let the age of son = S years and the age of father = F years.
According to the question,
=> F = 3*S.
=> F = 3S.

After 5 years,
=> (F+5) = 2.5 * (S+5).
=> 3S + 5 = 2.5S + 12.5 [put F=3S]
=> 0.5S = 7.5
=> S = 15
Hence, the age of son = 15 years.

Asked In :: iGate

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