Multiple choice

Ten years ago A, was half of B in age. If the ratio of their present ages is 3:4, What will be the total of their present ages? दस वर्ष पहले, A की आयु B की आधी है। यदि उनके वर्तमान आयु का अनुपात 3 : 4 है, तो उनकी कुल वर्तमान आयु क्या होगी?

  1. 8 years/वर्ष

  2. 20 years/वर्ष

  3. 35 years/वर्ष

  4. 45 years/वर्ष
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C Correct answer
Explanation

Ten years ago: A = B/2. Present ages: A/B = 3/4. Let A = 3x, B = 4x. Ten years ago: 3x-10 = (4x-10)/2. Solving: 6x - 20 = 4x - 10, 2x = 10, x = 5. A = 15, B = 20. Total = 35 years.

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