If the area of the circle `4x^(2)+4y^(2)-8x+16y+k=0` is `9pi` square units, then the value of k is

If the area of the circle 4x^(2) + 4y^(2) + 8x - 16y + lambda = 0 is 9 pi sq units, then the value of lambda is

The area of the circle x^(2)+y^(2)-4x-2y+k=0 is 25pi square units then k=

If the area of the circle x^(2)+y^(2)+4x+2y+k=0 is 5pi square cms then k=

If the area of the circle x^(2)+y^(2)+4x+2y+k=0 is 5pi square cms then k=

The area of the circle x^(2)-2x+y^(2)-10y+k=0 is 25pi sq. units. The value of k is equal to

If the area enclosed by y^(2)=2x and x^(2)+4+4x=4y^(2) is k square units, then the value of 3k is equal to

If the area enclosed by y^(2)=2x and x^(2)+4+4x=4y^(2) is k square units, then the value of 3k is equal to

The area of the circle x^(2) - 2x + y^(2) - 10y + k = 0 is 25 pi . The value of k is equal to

If the radius of the circle x^2+y^2+4x-2y-k=0 is 4 units find k.

If the straight line 3x + 4y = k touches the circle x^(2) + y^(2) = 16 x , then the values of k are