एका दंडगोलाची त्रिज्या आणि उंची 7 ∶ 13 या प्रमाणात आहे आणि त्याचे आकारमान 6006 सेमी3 आहे. त्याची त्रिज्या असेल:

(π = वापरा)

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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 सेमी
  2. 6 × 2 सेमी
  3. 5 × 2 सेमी
  4. 3 × 2 सेमी

Answer (Detailed Solution Below)

Option 1 : 7 × 3 सेमी
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SSC Selection Post Phase 13 Matriculation Level (Easy to Moderate) Full Test - 01
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Detailed Solution

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दिलेल्यापर्माणे:

एका दंडगोलाची त्रिज्या आणि उंची यांचे प्रमाण 7:13 आहे आणि त्याचे आकारमान 6006 सेमी³ आहे.

π = 22⁄7

वापरलेले सूत्र:

एका दंडगोलाचे आकारमान = πr²h

गणना:

त्रिज्या ७x आणि उंची १३x समजा.

आकारमान = 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

आता, त्रिज्या = 7x = 7 × ∛3 = 7 × 3 सेमी

∴ योग्य उत्तर 7 × 3 सेमी आहे.

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