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S1a n dS2 are the foci of an ellipse of ...

`S_1a n dS_2` are the foci of an ellipse of major axis of length 10 units, and `P` is any point on the ellipse such that the perimeter of triangle `P S_1` is 15. Then the eccentricity of the ellipse is 0.5 (b) 0.25 (c) 0.28 (d) 0.75

A

`0.5`

B

`0.25`

C

`0.28`

D

`0.75`

Text Solution

Verified by Experts

`2a(1+e)=15` ltbr.or 1+e=(3)/(2)`
or e=0.5
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