एका वृत्तचितीची उंची 14 सेमी आणि वक्रपृष्ठफळ 528 सेमी2 आहे. तर वृत्तचितीचे घनफळ शोधा.

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  1. 1244 सेमी3
  2. 792 सेमी3
  3. 1584 सेमी3
  4. 2538 सेमी3

Answer (Detailed Solution Below)

Option 3 : 1584 सेमी3
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RRB NTPC CBT-I Official Paper (Held On: 4 Jan 2021 Shift 1)
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दिलेले आहे:

वृत्तचितीचे वक्रपृष्ठफळ = 528 सेमी2

उंची = 14 सेमी

वापरलेली सूत्रे:

वृत्तचितीचे वक्रपृष्ठफळ = 2πRH

वृत्तचितीचे घनफळ = πR2H

गणना:

वृत्तचितीचे वक्रपृष्ठफळ = 528 = 2 × 22/7 × R × 14

⇒ R = 6 सेमी

वृत्तचितीचे घनफळ = 22/7 × 6 × 6 × 14 = 1584 सेमी3

वृत्तचितीचे घनफळ = 1584 सेमी3

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