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The angle of elevation of a cloud from a...

The angle of elevation of a cloud from a point h mt. above is `theta^@` and the angle of depression of its reflection in the lake is `phi`. Then, the height is

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The correct Answer is:
`(xsin(phi+theta))/(sin(phi-theta))`
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ML KHANNA-HEIGHTS AND DISTANCES-Problem Set (1) FILL IN THE BLANKS
  1. The angle of elevation of a cloud from a point h mt. above is theta^@ ...

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  2. The width of a road is b feet. On one side of which there is a window ...

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  3. The angle of elevation of the top of a pillar at any point A on the gr...

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  4. The angle of elevation of a tower from a point on the same level as th...

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  5. The angle of elevation of the top of a tower at a point A on the groun...

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  6. The height f a chimney when it is found that on walking towards it 100...

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  7. The shadow of a tower standing on a level ground is found to be 60 met...

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  8. A man in a boat rowed away from a cliff 150 m high takes 2 min, to cha...

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  9. An aeroplane flying horizontally , 1km above the ground , is observed...

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  10. The angle of elevation of the top and bottom of a flag staff fixed at ...

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  11. From the top of a cliff 200 ft. high, the angles of depression of the ...

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  12. A balloon moving in a straight line passes vertically above two points...

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  13. A balloon moving in a straight line passes vertically above two points...

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  14. A vertical pole (more than 100 ft. high) consists of two portions the ...

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  15. The angles of elevation of the top of a tower standing on a horizontal...

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  16. A tower of x metres height has flag staff at its top. The tower and th...

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  17. A wireless pole 25 metres high is fixed on a top of a verandah of a ho...

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  18. A round balloon of radius 'r' subtends an angle alpha at the eye of th...

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  19. A stationary balloon is observed from three points A, B and C on the p...

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  20. From the top of a pole of height h, the angle of elevation of the top ...

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