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The angle of elevation of an object from...

The angle of elevation of an object from a point P on the level ground is a. Moving d metres on the ground towards the object, the angle of elevation is found to be `beta`. Then the height (in metres) of the object is

A

`dtanalpha`

B

`dcotbeta`

C

`(d)/(cotalpha+cotbeta)`

D

`(d)/(cotalpha-cotbeta)`

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-HEIGHTS AND DISTANCES-PRACTICE SHEET Exercise-I (Level-I) (Straight Objective Type Questions)
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  2. From a point on the level ground, the angle of elevation of the top of...

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  3. The angle of elevation of an object from a point P on the level ground...

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  4. The elevation of an object on a hill is observed from a certain point...

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  5. The sum of angles of elevation of the top of a tower from two points d...

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  6. Two pillars of equal height stand at a distance of 100 metres. At a po...

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  7. The angle of elevation of the top of an unfinished tower from a point ...

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  8. In a prison wall there is a window of 1 metre height, 14 metres from t...

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  9. The angles of elevation of a tower from two points which are at distan...

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  10. The angle of elevation of the top of a tower from the top and botton o...

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  11. A flag staff of length 'd' stands on tower of height h. IF at a point ...

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  12. The tops of two poles of heights 10 metres and 12 metres are connected...

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  13. At a certain point the angle of elevation of a tower is found to be co...

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  14. The length of the shadow of vertical pole of height h, thrown by the s...

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  15. A person observes the top of a tower from a point A on the ground. the...

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  16. From the top of a tree, a man observes the angle of deppression of a p...

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  17. From the top of a chiff 30 metres high, the angle of elevation of the ...

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  18. A tower subtends an angle alpha at a point A on the same level as the ...

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  19. From the top of the hill h meers high the angles of depressinons of th...

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  20. The angle of elevation of a stationar cloud from a point 2500 m above ...

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