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Distance between a focus and the corresp...

Distance between a focus and the corresponding directrix of an ellipse is 16 . If eccentricity is `(3)/(5) ` , then lengths of its principal axes are

A

3,4

B

15,12

C

12,16

D

30,24

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The correct Answer is:
D
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MARVEL PUBLICATION-CIRCLE AND CONICS -MULTIPLE CHOICE QUESTIONS
  1. Distance between directrices = (25)/(2) , minor axis = 6

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  2. Distance between foci = 2 and vertices are (pm 2,0)

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  3. Distance between a focus and the corresponding directrix of an ellipse...

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  4. An ellipse , with principal axes along co-ordinate axes has eccentrici...

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  5. If two ellipse E ( a gt b ) "and " E ( alpha gt beta ) have the same...

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  6. If latus-rectum is one-third minor axis, then eccentricity of the elli...

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  7. If latus-rectum = ((1)/(2)) major axis, then e =

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  8. If latus-rectum = semi-minor axis, then e=

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  9. If (distance between directrices ) = 3 (distance between foci) , then ...

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  10. If m times distance between foci of an ellipse is equal to n times dis...

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  11. Can the distance between foci of an ellipse be equal to distance its d...

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  12. If eccentricities of a parabola and an ellipse are e and e' respective...

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  13. If eccentricities of a parabola and an ellipse are e and e' respective...

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  14. Co-ordinates of a point P((pi)/(3)) on the ellipse 16x^(2) + 25y^(2)...

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  15. foci of the ellipse x = 4 cos theta , y = 3 sin theta are

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  16. Focal distances of the point P (5, 4sqrt(3)) on the ellipse 64x^(2...

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  17. If a chord PQ , joining P (theta) " Q and " (phi) , of an ellipse (...

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  18. If P ( theta ) " and " Q (phi ) are two points on an ellipse (x^(2...

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  19. If a chord P(theta) Q(phi) of an ellipse (x^(2))/(a^(2)) + (y^(2))/(b...

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  20. If P (theta) is a point on the ellipse E (a gt b) , whose foci are...

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