एक गोल आणि त्याभोवती असलेली एक लंब वृत्तचिती यांच्या घनफळाचे गुणोत्तर काढा:

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  1. 2 : 1
  2. 1 : 2
  3. 2 : 3
  4. 1 : 1

Answer (Detailed Solution Below)

Option 3 : 2 : 3
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दिलेले आहे:

एक गोल आणि त्याभोवती असलेली एक लंब वृत्तचिती यांच्या घनफळाचे गुणोत्तर काढायचे आहे.

वापरलेले सूत्र:

गोलाचे घनफळ = \(\dfrac{4}{3}\pi r^3\)

लंब वृत्तचितीचे घनफळ = \(\pi r^2 \times 2r\)

गणना:

गोलाचे घनफळ = \(\dfrac{4}{3}\pi r^3\)

वृत्तचितीचे घनफळ = \(\pi r^2 \times 2r = 2\pi r^3\)

⇒ गुणोत्तर = \(\dfrac{\dfrac{4}{3}\pi r^3}{2\pi r^3}\)

⇒ गुणोत्तर = \(\dfrac{\dfrac{4}{3}}{2}\)

⇒ गुणोत्तर = \(\dfrac{2}{3}\)

∴ पर्याय (3) योग्य आहे.

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