What is the length of the major axis of the ellipse whose equation is `10x^(2)+20y^(2)=200?`

If the length of the daimeter of a circle is equal to the length of the major axis of the ellipse whose equation is x^(2)+4y^(2)-4x+8y-28 , to the nearest whole number , what is the area of the cirle ?

If the length of the major axis of an ellipse with the equation 5x^(2)+24y^(2)=40 is j and the length of the minor axis of the ellipse is n, then what is the value of j + n ?

The length of the major axis of the ellipse 3x^2+2y^2-6x8y-1=0 is

Length of the major axis of the ellipse 9x^(2)+7y^(2)=63, is

The length of the major axis of the ellipse 2x^(2)+y^(2)-8x-2y+1=0 is

The length of major axis of the ellipse x^2+2y^2+4x-12y-3=0 is

The length of the major axis of the ellipse (x-3)^(2)/4+(y-2)^(2)/9=1 is