If the circle `x^2+y^2+4x+22y+a=0` bisects the circumference of circle `x^2 + y^2 -2x+8y+b=0`,then `a-b` equals to

If the circle x^2+y^2+4x+22y+l=0 bisects the circumference of the circle x^2+y^2-2x+8y-m=0 , then l+m is equal to

If the circle x^2+y^2 +4x+22y + c = 0 bisects the circumference of the circle x^2 + y^2-2x + 8y-d = 0 ,then (c+d) is equal to

If the circle x^2+y^2 +4x+22y + c = 0 bisects the circumference of the circle x^2 + y^2-2x + 8y-d = 0 ,then (c+d) is equal to

If the circle x^(2)+y^(2)+4x+22y+c=0 bisects the circumference of the circle x^(2)+y^(2)-2x+8y-d=0 then c+d

If the circle x^2+y^2+6x+8y+a=0 bisects the circumference of the circle x^2 + y^2 + 2x - 6y - b = 0 then (a + b) is equal to

If the circle x^2 + y^2 + 6x -2y + k = 0 bisects the circumference of the circle x^2 + y^2 + 2x- 6y-15=0 , then

If the circle x^(2) + y^(2) + 4x -22y + c = 0 bisects the circumference of the circle x^(2) + y^(2) - 2x + 8y - d = 0 , then c + d =

If the circle x^(2)+y^(2)+4x+22y+c=0 bisects the circumference of the circle x^(2)+y^(2)-2x+8y-d=0 , then c+d is equal to a)30 b)50 c)40 d)56

If the circle x^(2)+y^(2)=4 bisects the circumference of the circle x^(2)+y^(2)-2x+6y+a=0 , then 'a' equals