Find the maximum length of double ordinate of an ellipse `25x^(2)+16y^(2)=400`

Consider an ellipse x^(2)/a^(2)+y^(2)/b^(2)=1 What is the length of the latus rectum of the ellipse 25x^(2)+16y^(2)=400 ?

Find the length of the chord x-2y-2=0 of the ellipse 4x^(2)+16y^(2)=64

The length of the latusrectum of the ellipse 16x^(2)+25y^(2)=400 is

Foci of the ellipse 16x^(2)+25y^(2)=400 are

What are the equations of the directrices of the ellipse 25^(2)+16y^(2)=400 ?

Find the ecentricity and length of latus rectum of the ellipse 16x^(2) + y^(2) = 16 .