Multiple choice

The average age of father and his son is 54 years. After 10 years the ratio of their ages will be in the ratio of 3 : 1 so find the present age of father?

  1. 82 year

  2. 84 year

  3. 86 year

  4. 89 year

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let father's present age be F, son's be S. Average age = 54, so F + S = 108. After 10 years: (F+10) : (S+10) = 3 : 1. So F+10 = 3(S+10), F = 3S + 20. Substituting: 3S + 20 + S = 108, 4S = 88, S = 22. Therefore F = 86. Father's present age is 86 years. Option C is correct.

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