Multiple choice

The sum of the present ages of father and son is 80 years. 4 years ago, the ratio of their age was 2:1. Father's present age will be- पिता और पुत्र की वर्तमान आयु का योगफल 80 वर्ष है। 4 वर्ष पूर्व उनकी आयु का अनुपात 2 : 1 था। पिता की वर्तमान आयु होगी?

  1. 25 year / वर्ष

  2. 52 year / वर्ष

  3. 53 year / वर्ष

  4. 62 year / वर्ष
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let father's current age = F, son's current age = S. F + S = 80. Four years ago: (F-4)/(S-4) = 2/1, so F-4 = 2(S-4) = 2S-8. Therefore F = 2S-4. Substitute in F+S=80: (2S-4)+S=80, so 3S-4=80, 3S=84, S=28. Father = 80-28 = 52 years. Four years ago father was 48 and son was 24, ratio 48:24 = 2:1 ✓

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