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An electrician has to repair an electric...

An electrician has to repair an electric fault on a pole of height 5m. She needs to reach a point 1.3m below the top of the pole to undertake the repair work (see the given figure). What should be the length of the ladder that she should use which, when inclined at an angle of `60^(@)` to teh horizontal, would enable her to reach the required position? Also, how far from the foot of the pole shoudl she place the foot of the ladder? (you may take `sqrt3= 1.73`)

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The correct Answer is:
2.14m
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KUMAR PRAKASHAN-SOME AAPLICATIONS OF TRIGONOMETRY-Objective Questions
  1. An electrician has to repair an electric fault on a pole of height 5m....

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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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