Minimum distance between` y^2-4x - 8y +40 =0` and `x^2 - 8x-4y +40=0` is

If perpendicular distance between lines 3x + 4y + 10 = 0 and 6x + 8y + k = 0 is 7/2 unit then k = ........

Minimum distance between the curves y^(2)=4x and x^(2)+y^(2)-12x+31=0 is

Perpendicular distance between 3x+4y-5=0 and 6x + 8y - 15=0 is …....

Find the distance between 3x+4y+5=0 and 6x+8y+2=0

Find the distance between the line 3x-4y+9=0 and 6x-8y-17=0

Distance between the lines 3x+4y-5=0 and 6x+8y-45=0 is

The distance between the parallel planes 4x-2y+4+9=0 and 8x-4y+8z+21=0 is

The distance between the parallel lines 3x+4y+3=0 and 6x+8y+11=0 is