Question

In an Ellipse distance between the foci is 6 and the length of minor axis is 8. Its eccentricity is

• A. 2/5
• B. 4/5
• C. 3/5
• D. 1/3

Answer 1

The correct option is C

3/5

$2ae=6,2b=8\Rightarrow b=4$

$b^2=a^2-a^2{e}^2\Rightarrow 16=a^2-9\Rightarrow a^2=25$

$e=\sqrt{1-\frac{16}{25}}=\sqrt{\frac{9}{25}}=\frac{3}{5}$