RRB NTPC CBT-1 practice question
The present ages of a father and his son are in the ratio 7 : 2. After 8 years the ratio becomes 9 : 4. The father's present age is
From a RRB NTPC CBT-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 28 years
4(7x + 8) = 9(2x + 8) → 28x + 32 = 18x + 72 → x = 4; father = 7 × 4 = 28 years. **తె:** తండ్రి వయసు 28.
हिंदी में प्रश्न
తండ్రి, కుమారుల ప్రస్తుత వయసుల నిష్పత్తి 7 : 2. 8 సంవత్సరాల తర్వాత అది 9 : 4 అవుతుంది. తండ్రి ప్రస్తుత వయసు?
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सही उत्तर: (B) 28 సంవత్సరాలు
4(7x + 8) = 9(2x + 8) → 28x + 32 = 18x + 72 → x = 4; पिता की आयु = 7 × 4 = 28 वर्ष। **हिं:** पिता की आयु 28।
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