If one of the diameters of the circle x^2+y^2-2x-6y+6=0 is a chord of another circle 'C', whose center is at...

Question

If one of the diameters of the circle x^2+y^2-2x-6y+6=0 is a chord of another circle 'C', whose center is at (2, 1), then its radius is ______

Accepted Answer

3

JEE Main 2021 Mathematics question