The locus of a point which moves in such a way that the sum of the squares of its distances from six faces of a cube is constant is
A
Sphere
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B
Circle
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C
Plane
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D
Ellipse
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Solution
The correct option is A Sphere It is very obvious that locus which moves in way that its sum of square of distance from six faces of cube is constant will be a sphere whose centre coincide with cube and diamete will be same as side of the cube.