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A circle has the same center as an ellip...

A circle has the same center as an ellipse and passes through the foci `F_1a n dF_2` of the ellipse, such that the two cuves intersect at four points. Let `P` be any one of their point of intersection. If the major axis of the ellipse is 17 and the area of triangle `P F_1F_2` is 30, then the distance between the foci is 13 (b) 10 (c) 11 (d) none of these

A

13

B

11

C

9

D

7

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