Q.

S1 and S2, 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 PS1S2, is 15. Then the eccentricity of the ellipse is

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a

0.5

b

0.25

c

0.28

d

0.75

answer is A.

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Detailed Solution

2a(1+e)=15or  1+e=32or  e=0.5
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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