अगर और s, x2 + y2 + z2 = a2 की बंद सतह है तो  क्या है?

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TN TRB Civil 2012 Paper
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  1. πa3
  2. 4πa3

Answer (Detailed Solution Below)

Option 3 : 4πa3

Detailed Solution

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संकल्पना:

गॉस अपसरण प्रमेय के अनुसार:

गणना:

दिया हुआ:

x2 + y2 + z2 = a2

∴ बंद सतह त्रिज्या r का एक गोला है

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