A) \[2\]
B) \[3\]
C) \[6\]
D) \[7\]
Correct Answer: B
Solution :
We know that, Centre is the mid- point of the diameter of any sphere. \[\therefore \] Coordinate of the centre of the sphere \[=\left( \frac{3+(-1)}{2},\,\frac{4+2}{2},\,\frac{-1+3}{2} \right)\] \[=(1,\,3,\,1)\] \[\therefore \] length of the radius = Distance between the Points \[(1,3,1)\] and \[(-1,2,3)\] \[=\sqrt{{{(1+1)}^{2}}+{{(3-2)}^{2}}+{{(1-3)}^{2}}}\] \[=\sqrt{4+1+4}=\sqrt{9}=3\]You need to login to perform this action.
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