Engineering Board Exam Reviewer · Ellipses · hard

Find the length of the latus rectum of an ellipse with semi-major axis 10 and semi-minor axis 6.

1. 7.2
2. 3.6
3. 14.4
4. 6.0

Answer

A. 7.2

Solution

Latus rectum =2b2/a=2(36)/10=7.2.

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