A) \[3\sqrt{6}\] unit
B) \[\sqrt{6}\] unit
C) \[2\sqrt{6}\]unit
D) 2 unit
E) \[3\sqrt{2}\]unit
Correct Answer: B
Solution :
The given point\[(1,2,-1)\]lies inside the sphere. \[\because \]Centre of sphere is (0, 0, 0), then the shortest distance between\[(1,2,-1)\]and surface of sphere \[=\sqrt{OQ}-\sqrt{OP}\] \[=\sqrt{24}-\sqrt{6}=2\sqrt{6}-\sqrt{6}\] \[=\sqrt{6}\,unit\]You need to login to perform this action.
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