The angle of elevation of a cloud from a point h mt above the surface of a lake is θ and the angle of depression of its reflection in the lake is θ. The height of the cloud is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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1.  1

2.  1/2

3.  2/3

4.  3/2

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4
Correct Answer :

2/3


Explanation :
No Explanation available for this question

The angle of the elevation of the top of a tower is 450 from a point 10 mt above the water level of a lake. The angle of depression of its image in the lake is 600. The height of the tower is

1.  10 (2+√3) mt

2.  27 (2+√3) mt

3.  10 (2-√3) mt

4.  75 (3+√3) mt

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4
Correct Answer :

10 (2+√3) mt


Explanation :
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A pole stands vertically, inside a triangle park ABC. If the angle of elevation of the top of the pole from each corner of the park is same, them in ABC, the foot of the pole is at the

1.  centroid

2.  circumcentre

3.  incentre

4.  orthocentre

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4
Correct Answer :

circumcentre


Explanation :
No Explanation available for this question

A pole of height h stands at one corner of a park in the shape of an equilateral triangle. If α is the angle which the pole subtends at the midpoint of the opposite side, the length of each side of the park is

1.  (√3/2) h cot α

2.  (2/√3) h cot α

3.  (√3/2) h tan α

4.  (2/√3) h tan α

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4
Correct Answer :

(2/√3) h cot α


Explanation :
No Explanation available for this question

If each side of length a of an equilateral triangle subtends an angle of 600 at the top of a tower h meter high situated at the centre of the triangle, then

1.  3a2= 2h2

2.  2a2 = 3h2

3.  a2= 3h2

4.  3a2= h2

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4
Correct Answer :

2a2 = 3h2


Explanation :
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1.  20/3

2.  3/2

3.  

4.  8/9

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4
Correct Answer :

20/3


Explanation :
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A tree learning towards east. Two points due west of tree are at distance a and b from its foot. If α and β are the elevations of the top of the tree from points, its inclination to the horizon is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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A chimney leans towards east. At equal distance due west and east of it in a horizontal plane, the angles of elevation of the top are α ,β. The inclination of the top of the chimney to the vertical is given by tan &the

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

1.  20/3

2.  3/2

3.   

4.  8/9

View Answer  
4
Correct Answer :

8/9


Explanation :
No Explanation available for this question
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