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From a point on a bridge across a river,...

From a point on a bridge across a river, the angles of depression of the banks on opposite sides of the river are `30^(@) and 45^(@)`, respectively. If the bridge is at a height of 3m from the banks, find the width of the river.

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The correct Answer is:
`3(sqrt3+1)m`
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KUMAR PRAKASHAN-SOME AAPLICATIONS OF TRIGONOMETRY-Objective Questions
  1. From a point on a bridge across a river, the angles of depression of t...

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  2. A kite is flying at a height of 75m from the level ground, attached to...

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  3. A ladder makes an angle of 60^(@) with the ground, when placed leaning...

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  4. The angle of elevation of the top of a tower from a point on the groun...

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  5. If the height of a man and the length of his shadow are equal, then th...

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  6. The height of a tower is 200m. When the altitude of the Sun is 30^(@),...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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