IBPS RRB Office Assistant (Multipurpose) Prelims practice question
The present ages of three friends X, Y and Z are in the ratio 2:3:4. Eight years ago, the sum of their ages was 48 years. Find Z's present age.
From a IBPS RRB Office Assistant (Multipurpose) Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 32 years
Let present ages be 2k, 3k, 4k. Eight years ago, sum = (2k-8)+(3k-8)+(4k-8) = 9k-24 = 48 → 9k = 72 → k = 8. So present ages are 16, 24, 32. Z's present age = 4k = 32 years.
हिंदी में प्रश्न
तीन मित्रों X, Y और Z की वर्तमान आयु का अनुपात 2:3:4 है। 8 वर्ष पहले, उनकी आयु का योग 48 वर्ष था। Z की वर्तमान आयु ज्ञात कीजिए।
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सही उत्तर: (D) 32 वर्ष
मान लीजिए वर्तमान आयु 2k, 3k, 4k है। 8 वर्ष पहले, योग = (2k-8)+(3k-8)+(4k-8) = 9k-24 = 48 → 9k = 72 → k = 8। अतः वर्तमान आयु 16, 24, 32 हैं। Z की वर्तमान आयु = 4k = 32 वर्ष।
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