वर्तुळात समाविष्ट असलेले चौरस आणि नियमित षटकोन यांच्या क्षेत्रफळांचे गुणोत्तर काय आहे?

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RRB ALP Previous Paper 7 (Held On: 13 Aug 2018 Shift 2)
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  1. 2 : 3
  2. 3√3 : 2
  3. 1 : √3
  4. 4 : 3√3

Answer (Detailed Solution Below)

Option 4 : 4 : 3√3
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13-Aug Shift 2 Komal D1 

वरील आकृतीत वर्तुळाचा व्यास चौरसाच्या कर्णाच्या लांबीएवढा आहे.

⇒ √2a = 2r

⇒ a = √2r

⇒ चौरसाचे क्षेत्रफळ = a2 = (√2r)2 = 2r2

13-Aug Shift 2 Komal D2

वरील आकृतीत वर्तुळाची त्रिज्या षटकोनाच्या बाजूएवढी आहे.

षटकोनामध्ये 6 समभुज त्रिकोण असतात,

⇒ षटकोनाचे क्षेत्रफळ = 6 × √3/4 × a2 = 6 × √3/4 × r2

∴ चौरस आणि षटकोन यांच्या क्षेत्रफळांचे गुणोत्तर = 2r2 : 6 × √3/4 × r2 = 4 : 3√3
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