Multiple choice

The sum of ages of a father and a son is 45 years. 5 years ago, the product of their ages was four times the father’s age at that time. What is father’s present age ? एक पिता और एक पुत्र की आयु का योग 45 वर्ष है। 5 वर्ष पूर्व उनकी आयु का गुणनफल उस समय पिता की आयु की 4 गुना थी। पिता की वर्तमान आयु क्या है ?

  1. 35 years 35 वर्ष

  2. 36 years 36 वर्ष

  3. 39 years 39 वर्ष

  4. 38 years 38 वर्ष

  5. None of these इनमें से कोई नहीं
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let father's present age = f, son's present age = s. Given: f+s=45. Five years ago: (f-5)(s-5)=4(f-5). If f≠5, divide: s-5=4, so s=9 and f=36. Checking: 5 years ago, father was 31, son was 4. Product=124, which is 4×31=124. ✓

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