6 In the space the equation by+cz+d=0 represents a plane perpendicualr to the..plane 1) YOZ 2) ZOX 3) OY 4) z = k 1. If the plane 56x + 4y + 9z 2016 meets the coordinate axes in A,B,C then the centroid of the Ale ABC is 224 224 1) (12,168,224) 2) (12,168,112) 3) 12,168,- 3. 4) 12,-168,- 3 8. If the plane 7x + 11y + 13z 3003 meets the coordinate axes in A,B,C then the centroid of the AABC is 1) (143,91,77) 2) (143,77,91) 3) (91,143,77) 4) (143,66,91) 9. A plane meets the coordinate axes at A,B,C so that the centroid of the triangle ABC is (1,2,4). Then the equation of the palne is: 1) x+ 2y + 4z = 12 2) 4x + 2y + z = 12 %3D 3) x + 2y + 4z = 3 4) 4x + 2y + z = 3 %3D 10. A varable plane is at a constant distance p from the origin and meets the axes in A,B and C. The locus of the centroid of the triangle ABC is 1)r2+y2 +z-2 = p2 2) x2+y2+z-2 = 4p-2