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 (Evening) · Quantitative Aptitude
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Correct answer: (B) 2√(7-√5)
Mean proportional = √[(4+√5)(12-2√20)] = √(28-4√5) = √[4(7-√5)] = 2√(7-√5).
हिंदी में प्रश्न
(4+√5) और (12-2√20) के बीच माध्यानुपाती ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 2√(7-√5)
माध्यानुपाती = √[(4+√5)(12-2√20)] = √(28-4√5) = √[4(7-√5)] = 2√(7-√5)।
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