SSC GD Constable previous year question
Find the mean proportional between (4+√5) and (12−2√20).
Asked in SSC GD Constable 2025: 12 Feb 2025 Shift 3 · Quantitative Aptitude
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Correct answer: (B) 2√(7−√5)
Mean proportional = √[(4+√5)(12−4√5)] = √(28−4√5) = 2√(7−√5).
हिंदी में प्रश्न
(4+√5) और (12−2√20) के बीच मध्यानुपाती (mean proportional) ज्ञात करें।
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सही उत्तर: (B) 2√(7−√5)
मध्यानुपाती = √[(4+√5)(12−4√5)] = √(28−4√5) = 2√(7−√5)।
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