The equation of the sphere with centre (3, 6, -4) and touching the plane 2x -2y -z -10 = 0 is
A
x2+y2+z2−6x+12y−8z+45=0
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B
x2+y2+z2+6x−9y+8z+35=0
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C
x2+y2+z2−6x+9y+8z+35=0
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D
x2+y2+z2−6x−12y+8z+45=0
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Solution
The correct option is Cx2+y2+z2−6x−12y+8z+45=0 Radius of the sphere = Distance of (3, 6, -4) from the given plane =|2×3−2×6+4−10√22+(−2)2+2=123=4 Hence, the required equation of the sphere is (x−3)2+(y−6)2+(z+4)2=(4)2 or x2+y2+z2−6x−12y+8z+45=0