The x, y, z coordinates of each vertex of a triangle are in A.P. The x and y coordinates of the centroid of the triangle are 1 and 3 respectively. The distance of the centroid from the origin is

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answer is B.

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Detailed Solution

∑x=3,∑y=9,∑z=3k and ∑z=2∑y−∑x=15

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