वर्तुळ एका चौकोन ABCD मध्ये कोरलेले आहे, जे AB, BC, CD आणि DA या बाजूंना अनुक्रमे P, Q, R आणि S येथे स्पर्श करते. जर AS = 6 सेमी, BC = 12 सेमी, आणि CR = 5 सेमी, तर AB ची लांबी (सेमी मध्ये) किती आहे?

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SSC CGL 2020 Tier-I Official Paper 16 (Held On : 23 Aug 2021 Shift 1)
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  1. 15
  2. 11
  3. 12
  4. 13

Answer (Detailed Solution Below)

Option 4 : 13
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दिलेल्याप्रमाणे:

AS = 6 सेमी

BC = 12 सेमी

CR = 5 सेमी

वापरलेली संकल्पना:

जर एका बाह्य बिंदूपासून, दोन स्पर्शरेषा वर्तुळात काढल्या गेल्या असतील तर त्यांना समान स्पर्शिका विभाग असतात.

गणना:

F1 Arun K 20-1-22 Savita D3

⇒ CR = CQ = 5 सेमी

⇒ BQ = BC – CQ

⇒ (12 – 5) = 7 सेमी

⇒ BQ = BP = 7 सेमी....(1)

⇒ AS = AP = 6 सेमी....(2)

समीकरण (1) आणि (2) एकत्र केल्यावर, आपल्याला मिळते 

⇒ (7 + 6)

⇒ 13 सेमी

∴ AB ची लांबी 13 सेमी आहे

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