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The distance between the directrices of ...

The distance between the directrices of ellipse `(x^(2))/(36)+(y^(2))/(20)=1` is (i) 81 (ii) 9 (iii) 18 (iv) None of these

A

81

B

9

C

18

D

None of these

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • The distance between the directrices of the ellipse (x^(2))/(36)+(y^(2))/(20)=1 is

    A
    16 units
    B
    17 units
    C
    18 units
    D
    19 units

  • The distance between the foci of the ellipse 5x^(2)+9y^(2)=45 is

    A
    2
    B
    3
    C
    4
    D
    5

  • The length of latus rectum of the ellipse 3x^(2) + y^(2) = 12 is (i) 4 (ii) 3 (iii) 8 (iv) (4)/(sqrt(3))

    A
    4
    B
    3
    C
    8
    D
    `(4)/(sqrt(3))`

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