Multiple choice

Father's age is equal to sum of mother's and son's age and average of ages of all three is 20 years, then calculate father's age. पिता की आयु, माता की आयु व पुत्र की आयु के योग के बराबर है और सभी की औसत आयु 20 वर्ष है तो पिता की आयु की गणना कीजिए।

  1. 30 years/वर्ष

  2. 35 years/वर्ष

  3. 40 years/वर्ष

  4. 45 years/वर्ष
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A Correct answer
Explanation

Let father = F, mother = M, son = S. Given F = M + S and average is 20, so (F + M + S)/3 = 20, meaning F + M + S = 60. Substituting F: (M + S) + M + S = 60, so 2M + 2S = 60, giving M + S = 30. Therefore F = M + S = 30 years.

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