Multiple choice

The average age of a man and his two sons born on the same day is 30 years. The ratio of the ages of father and one of his sons is 5 : 2 respectively. What is the father’s age? एक आदमी और उसके दो बेटों (एक ही दिन पैदा हुए) की औसत आयु 30 वर्ष है। पिता की आयु और उसके एक बेटे की आयु का अनुपात 5 : 2 है, तो पिता की आयु क्या है?

  1. 50 years

  2. 30 years

  3. 45 years

  4. 20 years
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A Correct answer
Explanation

Let father's age be F and each son's age be S. From average: (F+2S)/3=30, so F+2S=90. From ratio F:S=5:2, F=5S/2. Substituting: 5S/2+2S=90, giving S=20 and F=50 years.

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