Length of latus rectum of ellipse x²/25 + y²/9 = 1:
A4
B10
C6
D18/5 (= 2b²/a)
Answer & Solution
Correct answer: D. 18/5 (= 2b²/a)
For ellipse: latus rectum = 2b²/a = 2(9)/5 = 18/5 = 3.6.
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