जर एका वर्तुळाच्या केंद्रापासून 21 सेमी अंतरावर काढलेल्या जीवेची लांबी 40 सेमी असेल, तर वर्तुळाची त्रिज्या (सेमीमध्ये) काढा:

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SSC CGL 2023 Tier-I Official Paper (Held On: 24 Jul 2023 Shift 1)
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  1. 29
  2. 21
  3. 25
  4. 20

Answer (Detailed Solution Below)

Option 1 : 29
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Detailed Solution

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दिलेले आहे:

जीवा = 40 सेमी

केंद्रापासून जीवेचे अंतर = 21 सेमी

संकल्पना:

जीवेच्या केंद्रापासून काढलेला लंब हा त्या जीवेला दोन समान भागांमध्ये विभाजित करतो.

पायथागोरसचे प्रमेय:

OA2 = OD2 + AD2

गणना:

F1 Ashish Madhu 19.10.21 D3

समजा, AB ही 40 सेमी लांबीची जीवा आहे.

⇒ OD हे लंब अंतर आहे.

⇒ AO ही वर्तुळाची त्रिज्या आहे.

OA2 = OD2 + AD2

⇒ OA2 = 212 + (40/2)2

⇒ OA= 441 + 400 

⇒ OA2= 841

OA = √841

OA = 29

वर्तुळाची त्रिज्या (सेमीमध्ये) 29 आहे.

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