A circle has the same centre as an ellipse & passes through the foci FI & F2 of the ellipse, such that the
two curves interseet in 4 points. Let 'P' be any one of their point of intersection. If the major axis of the
ellipse is 17; the area of the triangle PFlF2 is 30, then the distance between the foci is:

I just know that 2a=17

after that I am not getting any idea of using the are information