20 सेमी त्रिज्या आणि 100 सेमी उंचीच्या वृत्तचितीमधून 10 सेमी त्रिज्या आणि 20 सेमी उंचीचे किती वृत्तचिती पाण्याने भरले जाऊ शकतात?

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RRB Group D 25 Aug 2022 Shift 2 Official Paper
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  1. 30
  2. 60
  3. 20
  4. 40

Answer (Detailed Solution Below)

Option 3 : 20
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Detailed Solution

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दिले:

10cm त्रिज्या आणि 20cm उंचीचा सिलेंडर.

एका सिलेंडरची 20 सेमी त्रिज्या आणि 100 सेमी उंची असते.

वापरलेले सूत्र:

सिलेंडरची मात्रा \(=\pi r^2 h\)

गणना:

लहान सिलेंडरची मात्रा \(=\pi×(10)^2×20 cm^3\) .

मोठ्या सिलेंडरचा आवाज \(=\pi×(20)^2×100cm^3\)

सिलिंडरची संख्या \({\text{मोठ्या सिलेंडरची मात्रा}\over\text{लहान सिलेंडरची मात्रा}}=\frac{\pi×(20)^2×100}{\pi×(10)^2× २०}\\=२०\)

त्यामुळे सिलिंडरची आवश्यक संख्या 20 आहे.

Latest RRB Group D Updates

Last updated on Jun 30, 2025

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