The length of the common chord of the circles `x^(2)+y^(2)-2x-1=0` and `x^(2)+y^(2)+4y-1=0`, is

The length of the common chord of the two circles x^(2)+y^(2)-4y=0 and x^(2)+y^(2)-8x-4y+11=0 is

The circles x^(2)+y^(2)-2x-4y+1=0 and x^(2)+y^(2)+4y-1 =0

The length of the common chord of the circles x^(2)+y^(2)-2x+4y-20=0,x^(2)+y^(2)+6x+10y-2=0

Find the length of the common chord of the circles x^(2)+y^(2)+2x+6y=0 and x^(2)+y^(2)-4x-2y-6=0

The lenght of the common chord of circles x^(2)+y^(2)-6x-16=0 and x^(2)+y^(2)-8y-9=0 is

The length of the common chord of the circle x^(2)+y^(2)+2 x+3 y+1=0 and x^(2)+y^(2)+4 x+3 y+2=0 is

The length of the common chord of the two circles x^(2) + y^(2) - 4y = 0 " and " x^(2) + y^(2) - 8x - 4y - 11= 0 is