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Q: एक पिता और उसके पुत्र की आयु का दुगुना पुत्र की आयु का 8 गुना है। यदि पिता और पुत्र की औसत आयु 30 वर्ष है, तो पिता की आयु क्या है? 

  • 1
    42 yrs
  • 2
    45 yrs
  • 3
    36 yrs
  • 4
    38 yrs
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Answer : 2. "45 yrs"
Explanation :

Answer: B) 45 yrs Explanation: Let father's age be x year and son's age be y year. According to question, 2(x+y) = 8y _______(I) and (x+y)/2 = 30 => x+y = 60 years__________(II) From equation (I) and (II) 8 y = 120 y = 15 years, Hence x = 45 years.

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