The length of the latus rectum of $x^2+3 y^2=12$ is

If the area of the ellipse is $$\frac{x^2}{25}+\frac{y^2}{\lambda^2}=1$$ is $$20 \pi$$ sq units, then $$\lambda$$ is

The eccentricity of the ellipse $$9 x^2+25 y^2=225$$ is