If the eccentricity of an ellipse be \( 5 / 8 \) and the
\( \mathrm...
If the eccentricity of an ellipse be \( 5 / 8 \) and the
\( \mathrm{P}^{17: 0} \) distance between its foci be 10 , then its latus rectum is:
W
(1) \( 39 / 4 \)
(2) 12
(3) 15
(4) \( 37 / 2 \)
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