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The angle of elevation of the top of an ...

The angle of elevation of the top of an unfinished tower at a distance of 100 m from its base is `45^(@)`. How much higher must the tower be raised so that angle of elevation of its top at the same point may be `60^(@)`?

A

`50sqrt(2)` m

B

100 m

C

`100(sqrt(3)-1)` m

D

`100(sqrt(3+1))` m

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The correct Answer is:
C
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LUCENT PUBLICATION-HEIGHT AND DISTANCE-EXERCISE-12A
  1. The shadow of a tower is 15 m when the Sun's altitude is 30^(@). What ...

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  2. The angles of elevation of the top of a tower from two points situated...

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  3. The angle of elevation of the top of an unfinished tower at a distance...

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  4. The shadow of a tree is 16 meter when elevation of Sun is 60^(@). What...

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  5. From a lighthouse the angles of depression of two ships on opposite si...

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  6. An aeroplane is vertically above the another plane flying at a height ...

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  7. A man stands at the end point of the shadow of a pole. He measure that...

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  8. The angle of depression of vertices of a regular hexagon lying in a pl...

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  9. Two poles, one is double in length of other, are standing opposite to ...

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  10. The angle of elevation of top of a house from top and bottom of tree a...

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  11. At a point on a horizontal line through the base of a monument ...

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  12. The angle of elevation of the to of a tower from a point A on the grou...

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  13. There are two vertical posts ,one on each side of a road ,just opposit...

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  14. At the foot of a mountain the elevation of its summit is 45^(@). After...

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  15. From a point on the ground the angle of elevation of top of a house an...

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  16. From a point of the ground, angle of elevation of top of a tower is 30...

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  17. The angle of depression of two consecutive kilometer stones in opposit...

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  18. The angle of elevation and depression of top of a statue from a point ...

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  19. A spherical balloon of radius 10 feet is in the open air. If angle of ...

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  20. The angle of elevation of an aeroplane from a point on the ground is 4...

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