उस घन का आयतन कितना होगा जिसका संपूर्ण पृष्ठीय क्षेत्रफल 1944 सेमी2 है?

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NTPC CBT-I (Held On: 20 Jan 2021 Shift 1)
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  1. 5832 सेमी3
  2. 3888 सेमी3
  3. 729 सेमी3
  4. 972 सेमी3

Answer (Detailed Solution Below)

Option 1 : 5832 सेमी3
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दिया गया है

घन का संपूर्ण पृष्ठीय क्षेत्रफल = 1944 सेमी2

प्रयुक्त सूत्र

घन का संपूर्ण पृष्ठीय क्षेत्रफल = 6(भुजा)2

घन का आयतन = (भुजा)3

गणना

मान लीजिए कि घन की भुजा a सेमी है।

6a2 = 1944

⇒ a2 = 1944/6

⇒ a2 = 324

⇒ a = 18 सेमी

घन का आयतन = (18)3

⇒ 18 × 18 × 18

⇒ 5832 सेमी3

घन का आयतन 5832 सेमी3 है।

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