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A flag staff of 5 mts high stands on a b...

A flag staff of 5 mts high stands on a building of 25 mt high. At an observer at a height of 30 mt the flag staff and the building subtend equal angles. The distance of the observer from the top of the flag staff is

A

`5 sqrt3`

B

`5sqrt2`

C

`5sqrt6`

D

`(5sqrt3)/sqrt2`

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1C
  1. The angles of elevation of a cliff at a point A on the ground and at a...

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  2. The top of a hill observed from the top and bottom of a building of he...

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  3. A flag staff of 5 mts high stands on a building of 25 mt high. At an o...

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  4. From the top of a building 60 m high the angle of elevation of the top...

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  5. The horizontal distance between two towers is 60m and the angular depr...

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  6. From the top of a cliff 60 mt high, the angles of depression of top an...

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  7. From the top of the hill h metres high the angles of depression of the...

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  8. These are two towers on a horizontal line. From the mid point of the l...

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  9. The angles of elevation of the tops of two vertical towers as seen fro...

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  10. P is a point on the segment joining the feet to vertical poles of heig...

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  11. A tower subtends angles alpha,2 alpha, 3 alpha respectively at points ...

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  12. The angle of elevation of a cloud from a point h mt above the surface ...

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  13. The angle of elevation of a stationary cloud from a point 2500 mt abov...

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  14. The angle of elevation of the top of the tower observed from each of t...

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  15. A person stading on the bank of a river observerves that the angle of ...

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  16. ABC is a triangular park with AB=AC=100 meters. A clock tower is situa...

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  17. An aeroplane flying with uniform speed horizontally one kilometer abov...

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  18. The upper 3//4^(th) portion of a vertical pole subtends an angle "Tan"...

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  19. A vertical pole subtends an angle Tan^-1(1/2) at a point P on the grou...

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  20. The angle of elevation of a stationar cloud from a point 2500 m above ...

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