Let O be the origin and P be the point at a distance 3 units from origin. If d.x.s' of OP are 1, - 2, - 2, then coordinates of P is given by
If centroid of the tetrahedron OABC, where coordinates of A, B, C are (a, 2, 3), (1, b, 3) and (2, 1, c) respectively be (1, 2, 3), then find the distance of a point (a, b, c) from the origin, where O is the origin.