Multiple choice

The present ratio between the age of A and B is 3 : 4. After four years, B will elder than A by 5 years. What is the present age of A? A और B की वर्तमान आयु में अनुपात 3 : 4 है | चार वर्ष बाद, B, A से 5 वर्ष बड़ा होगा | A की वर्तमान आयु क्या है ?

  1. 15 years/वर्ष

  2. 18 years/वर्ष

  3. 20 years/वर्ष

  4. 25 years/वर्ष
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A Correct answer
Explanation

Let A's age = 3x, B's age = 4x. After 4 years: (4x+4) - (3x+4) = 5, so x = 5. Therefore A = 15 years, B = 20 years. Check: Present ratio is 15:20 = 3:4. After 4 years, A = 19, B = 24, and 24-19 = 5. This satisfies both conditions. A is currently 15 years old.

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