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Question

A father said to his son, "I was as old as you are when I became your father." If the current age of father is 52 years, the age of son after 10 years will be___________.

The correct answer is
36 years

This problem involves calculating ages based on a specific relationship described by the father. The key is understanding that the age difference between the father and son remains constant.

Father Son Age Logic

Let $F$ represent the father's current age and $S$ represent the son's current age.

  • We are given the father's current age: $F = 52$ years.

Analyzing the Statement

The father's statement is: "I was as old as you are when I became your father."

  • "When I became your father" refers to the time when the son was born.
  • This was $S$ years ago (the son's current age).
  • Therefore, the father's age at that time was $F - S$.
  • The statement sets up the equation: Father's age then = Son's age now.
  • So, $F - S = S$.

Calculating Son's Current Age

Substitute the father's current age ($F = 52$) into the equation:

$ 52 - S = S $

To solve for $S$, add $S$ to both sides:

$ 52 = S + S $

$ 52 = 2S $

Divide by 2:

$ S = \frac{52}{2} $

$ S = 26 $

The son's current age is 26 years.

Finding Son's Future Age

The question asks for the son's age after 10 years.

Son's age after 10 years = Son's current age + 10 years

$ \text{Son's age after 10 years} = 26 + 10 $

$ \text{Son's age after 10 years} = 36 \text{ years} $

The son's age after 10 years will be 36 years.

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Important Questions from Problem on Ages (Notes)

  1. एक व्यक्ति की वर्तमान आयु उसकी माँ की आयु का $2/9$ वाँ भाग है । 10 वर्ष बाद, वह अपनी माँ की आयु का $4/11$ वाँ भाग हो जाएगा । 15 वर्ष बाद माँ की आयु कितनी होगी?
  2. एक आदमी अपने बेटे से 24 साल बड़ा है । दो साल बाद, उसकी उम्र उसके बेटे की उम्र से दोगुनी हो जाएगी । उसके बेटे की वर्तमान आयु है
  3. एक पिता ने अपने बेटे से कहा, "मैं तुम्हारे जन्म के समय तुम्हारी वर्तमान उम्र के बराबर था।" यदि पिता की उम्र अब 38 वर्ष है, तो पाँच वर्ष पहले बेटे की उम्र थी
  4. समीर और आनंद की वर्तमान आयु क्रमशः $5:4$ के अनुपात में है । तीन साल बाद, उनकी आयु का अनुपात क्रमशः $11:9$ हो जाएगा । आनंद की वर्तमान आयु वर्षों में क्या है ?
  5. कमला अपने छोटे भाई से दो गुना बड़ी है। यदि उनके बीच के आयु में अंतर 15 वर्ष है, तो उसके छोटे भाई की आयु क्या होगी ?
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