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If a parabolic reflector is 20 cm in dia...

If a parabolic reflector is 20 cm in diameter and 5 cm deep, find its focus.

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RD SHARMA ENGLISH-PARABOLA-All Questions
  1. P is parabola, whose vertex and focus are on the positive x axis at di...

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  2. Find the locus of the middle points of the chords of the parabola y^2=...

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  3. If a parabolic reflector is 20 cm in diameter and 5 cm deep, find its ...

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  4. over the towers of a bridge a cable is hung in the form of a parabola,...

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  5. The focus of a parabolic mirror is at a  distance of 6 cm from its ver...

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  6. An arch is in the form of a parabola with its axis vertical. The arc i...

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  7. A beam is supported at its ends by supports which are 12 metres apart....

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  8. Find the equation of the parabola whose: focus is (3,0) and the dir...

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  9. The equation of the parabola whose focus is (1, 1) and the directrix ...

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  10. Find the equation of the parabola whose: focus is (0,0) and the dir...

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  11. Find the length of the latus rectum of the parabola whose focus is at ...

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  12. Find the length of the latus rectum of the parabola whose focus is at ...

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  13. Find the equation of the parabola, if the focus is at (-6,-6) and the...

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  14. Find the equation of the parabola, if: the focus is at (0,-3) and the ...

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  15. Find the equation of the parabola, if: the focus is at (0,-3) and the ...

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  16. Find the equation of the parabola, if: the focus is at (a ,0) and the ...

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  17. Find the equation of the parabola whose focus is (0,0) and the vertex ...

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  18. Find the vertex , focus, axis, directrix and latus rectum of the fo...

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  19. Find the vertex, focus, directrix, axis and latus-rectum of the par...

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  20. Find the vertex , focus, axis, directrix and latus rectum of the fo...

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