Find the centre and radius of the circle `x^2+y^2 +z^2-2y-4z=11,x+2y+2z= 15`.

Find the centre and radius of the sphere 2x^2+2y^2+2z^2-2x-4y+2z+3=0 .

Find the centre and radius of the sphere 2x^2+2y^2+2z^2-2x-4y+2z+3=0 .

Find the centre and radius of the sphere 2x^2+2y^2+2z^2-2x-4y+2z+3=0 .

Find the centre and radius of the sphere 2x^2+2y^2+2z^2-2x-4y+2z+3=0 .

radius of circle x^(2)+y^(2)+z^(2)-2y-4z-20=0,x+2y+2z=15

Find the centre and radius of the sphere 2x^2+2y^2+2z^2-2x+4y+2z+3=0 .

Find the centre and radius of the circle x^(2)+y^(2)+z^(2)=9;x+y+z=3. Also find the equation of the sphere having this circle as a great circle.

Find the centre and radius of sphere 2(x-5)(x+1)+2(y+5)(y-1)+2(z-2)(z+2)=7 .