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The angle of elevation of a bird sitting...

The angle of elevation of a bird sitting on top of a tree as seen from the point at a distance of 20m from the base of the tree is `60^(@)`. Then, the height of the tree is ……..m

A

`20 sqrt3`

B

`10 sqrt3`

C

20

D

10

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The correct Answer is:
B, C
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KUMAR PRAKASHAN-SOME AAPLICATIONS OF TRIGONOMETRY-Objective Questions
  1. The height of a tower is 200m. When the altitude of the Sun is 30^(@),...

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  2. The angle of elevation of the top of a 15m high tower from a point 15m...

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  3. The angle of depression of a boat from a 50m high bridge is 30^(@). Th...

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  4. The angle of elevation of a bird sitting on top of a tree as seen from...

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  5. The length of the shadow of a 10m high tree is ……..m when the angle of...

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  6. The top of two poles of height 16m and 10m are connected by a wire. If...

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  7. The angle of elevation of the top of a tower from a point P on the gro...

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  8. A 1.8m tall girl stands at a distance of 4.6m from a lamp post and cas...

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  9. The angle of elevation of the top of a tower at a distance 500m from t...

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  10. A tower stands on a horizontal plane. The shadow of the tower when the...

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  11. The angle of elevation of the top of a tower from a point 30m away fro...

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  12. The height of a tower is 10m. What is the length of its shadow when th...

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  13. An observer, 1.5m tall, is 28.5m away from a 30m high tower. Determine...

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  14. An observer 1.7m tall, is 20 sqrt3m away from a tower. The angle of el...

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  15. The angle of elevation of the top of an adjustable pole from a point o...

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  16. The two towers of heights x and y, standing on level ground, subtend a...

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  17. When the Sun's altitude is 45^(@), the height of a tower and the lengt...

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  18. In a right triangle, if the measure of an acute angle is 30^(@), the s...

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  19. A 10m long ladder leaning on a wall reaches the height of 5m on the wa...

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  20. Walking 20m on a slope of inclination 30^(@) with the level ground, on...

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