`(a, c) and (b, c)` are the centres of two circles whose radical axis is the y-axis. If the radius of the first circle is r then the diameter of the other circle is

If C_1 (1, 3) and C_2 (4, 3)are the centres of two circles whose radical axis is y-axis. If the radius of the 1st circle is 2sqrt2 units, then the radius of the second circle is

If C_1 (1, 3) and C_2 (4, 3)are the centres of two circles whose radical axis is y-axis. If the radius of the 1st circle is 2sqrt2 units, then the radius of the second circle is

Diameter of a circle whose radius is 'r' is

The centres of the circles are (a,c) and (b,c) and their radical axis is the y-axis . The radical of one of the circle is r . The radius of the other circle is

The centres of the circles are (a, c) and (b, c) and their radical axis is y-axis. The radius of one of the circles is r. The radius of the other circle is

The centres of the circles are (a, c) and (b, c) and their radical axis is y-axis. The radius of one of the circles is r. The radius of the other circle is

(a,0) and (b, 0) are centres of two circles belonging to a co-axial system of which y-axis is the radical axis. If radius of one of the circles 'r', then the radius of the other circle is

(a,0) and (b, 0) are centres of two circles belonging to a co-axial system of which y-axis is the radical axis. If radius of one of the circles 'r', then the radius of the other circle is

A circle centre (1,2) touches y-axis. Radius of the circle is