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Unit 5 · Mathematical Reasoning and Aptitude Paper 1 · 20 October 2022 Evening

Eighteen years ago, a man was three times as old as his son. Now, the man is twice as old as his son. The sum of the present ages of the man and his son is18 वर्ष पहले, एक व्यक्ति अपने बेटे से तीन गुना बड़ा था। अभी, वह अपने बेटे से दो गुना बड़ा है। व्यक्ति और उसके बेटे की वर्तमान आयु का योग है:

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Correct answer: D. 108

Explanation

Let the son's present age be x; man = 2x. Then 2x − 18 = 3(x − 18) ⇒ 2x − 18 = 3x − 54 ⇒ x = 36, man = 72. Sum = 36 + 72 = 108.माना बेटे की वर्तमान आयु x है; व्यक्ति = 2x। तब 2x − 18 = 3(x − 18) ⇒ 2x − 18 = 3x − 54 ⇒ x = 36, व्यक्ति = 72। योग = 36 + 72 = 108।

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