एक बेलन की त्रिज्या और ऊँचाई का अनुपात 7 ∶ 13 है और इसका आयतन 6006 सेमी3 है। इसकी त्रिज्या होगी:

(π = \(\frac{22}{7}\) का प्रयोग कीजिए)

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SSC Selection Post 2024 (Matriculation Level) Official Paper (Held On: 25 Jun, 2024 Shift 1)
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  1. 7 × 3 \(\frac{1}{3}\) सेमी
  2. 6 × 2 \(\frac{1}{3}\) सेमी
  3. 5 × 2 \(\frac{1}{3}\) सेमी
  4. 3 × 2 \(\frac{1}{3}\) सेमी

Answer (Detailed Solution Below)

Option 1 : 7 × 3 \(\frac{1}{3}\) सेमी
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दिया गया है:

एक बेलन की त्रिज्या और ऊँचाई का अनुपात 7:13 है, और इसका आयतन 6006 सेमी³ है।

π = 22⁄7

प्रयुक्त सूत्र:

बेलन का आयतन = πr²h

गणना:

माना त्रिज्या 7x है और ऊँचाई 13x है।

आयतन = πr²h

⇒ 6006 = (22⁄7) × (7x)² × 13x

⇒ 6006 = (22⁄7) × 49x² × 13x

⇒ 6006 = (22 × 49 × 13)⁄7 × x³

⇒ 6006 = 2002x³

⇒ x³ = 6006 ÷ 2002 = 3

⇒ x = ∛3

अब, त्रिज्या = 7x = 7 × ∛3 = 7 × 3\(\frac{1}{3}\)  सेमी

∴ सही उत्तर 7 × 3\(\frac{1}{3}\) सेमी है 

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