वर्तुळाच्या दोन जीवा AB आणि CD वर्तुळाच्या बाहेर F बिंदूला छेदतात.

AF = 12 सेमी, BF = 4 सेमी आणि CF = 16 सेमी असल्यास, CD ची लांबी काढा.

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RRB NTPC CBT 2 (Level-5) Official Paper (Held On: 12 June 2022 Shift 1)
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  1. 13 सेमी
  2. 12 सेमी
  3. 11 सेमी
  4. 10 सेमी

Answer (Detailed Solution Below)

Option 1 : 13 सेमी
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
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Detailed Solution

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दिलेले आहे:

वर्तुळाच्या दोन जीवा AB आणि CD वर्तुळाच्या बाहेर F बिंदूला छेदतात.

AF = 12 सेमी

BF = 4 सेमी

CF = 16 सेमी

वापरलेली संकल्पना:

जर वर्तुळाच्या दोन जीवा AB आणि CD वर्तुळाच्या बाहेर F बिंदूवर छेदल्या तर,

AF × BF = CF × DF

F1 Pranali Railways 27.06.22 D2

गणना:

F1 Pranali Railways 27.06.22 D3

DF एक सेमी मानूया

तर, संकल्पनेनुसार,

AF × BF = CF × DF

⇒ 12 × 4 = 16 × a

⇒ 48 = 16a

⇒ a = 48/16

⇒ a = 3

म्हणून, DF = 3

आता,

CD = CF - DF

⇒ CD = 16 - 3

⇒ CD = 13 सेमी

∴ CDची लांबी 13 सेमी आहे.

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