Multiple choice

The sum of the ages of father and son is 45yrs. Five years ago the product of their ages was 4 times the father’s age at that time the present ages of father & son are?

  1. 39, 6

  2. 35, 10

  3. 36, 9

  4. 40, 10

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

माना पिता की आयु F, पुत्र की S। F + S = 45। 5 वर्ष पूर्व: (F-5)(S-5) = 4(F-5)। यदि F ≠ 5: S-5 = 4, S = 9। तब F = 45 - 9 = 36। जांच: 5 वर्ष पहले पिता 31, पुत्र 4; 31 × 4 = 124, 4 × 31 = 124 (सत्य)। विकल्प C (36, 9) सही है। विकल्प A, B, D गलत क्योंकि योग 45 नहीं है।

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