Multiple choice

Six years hence a father's age will be three times his son's age and three years ago father was nine times as old as his son. What is the present age of father? छः वर्ष बाद एक पिता की आयु अपने पुत्र की आयु की तीन गुना होगी और तीन वर्ष पहले पिता अपने पुत्र से नौ गुना बड़ा था। पिता की वर्तमान आयु क्या है?

  1. 48 years/वर्ष

  2. 42 years/वर्ष

  3. 36 years/वर्ष

  4. 30 years/वर्ष

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let father's present age = F, son's present age = S. Six years hence: F+6 = 3(S+6), so F = 3S+12. Three years ago: F-3 = 9(S-3), so F = 9S-24. Equating: 3S+12 = 9S-24, giving 6S = 36 and S = 6. Therefore F = 3×6+12 = 30 years.