# The value of k if (1, 2) (k, -1) are conjugate points with respect to the ellipse 2x2+3y2=6 is

1.  2

2.  4

3.  6

4.  8

4

6

Explanation :
No Explanation available for this question

# If 2x-y+3=0, 4x+ky+3=0 are conjugate with respect to the ellipse 5x2+6y2-15=0 then k=

1.  1

2.  2

3.  3

4.  6

4

6

Explanation :
No Explanation available for this question

# A tower 51 m high has a mark at a height of 25m from the ground. If the two parts subtend equal angles to an eye at the height of 15 m from the ground, the distance of the tower from the observe is

1.  160 m

2.  150 m

3.  140 m

4.  none

4

160 m

Explanation :
No Explanation available for this question

# From the foot of a tower 220 m high the angle of elevation of the top of a hill is 600 and from the top of the tower the angle of depression of the top of the hill is 300. The height of the hill and the distance betwee

1.  165,55√3

2.  165,55

3.  65√3, 55

4.  165√3, 55√3

4

165,55√3

Explanation :
No Explanation available for this question

# The angles of elevation of the top of a lower from the bottom and top of a building of height h mt are α and β respectively. The height of the tower is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.  7/2

2.  17/11

3.  7/36

4.  -7/3

4

-7/3

Explanation :
No Explanation available for this question

# The angles of elevation of the tops of two vertical towers as seen from the middle point of the line joining the foot of the towers are 600,300 respectively. The ratio of the heights of the towers is:

1.  2:1

2.  √3:1

3.  3:2

4.  3:1

4

3:1

Explanation :
No Explanation available for this question

# Two pillars of equal height stand at a distance of 100 mt. At a point between them, the elevations of their tops are found to be 300 and 600. The height of the pillars and the position of the point of observ

1.  100 (√3-1), 100 (√3+1) mt

2.  15√3, 15(3+√3) mt

3.  25√3 mt, 75 mt

4.  10(2+√3), 27 (2+√3) mt

4

25√3 mt, 75 mt

Explanation :
No Explanation available for this question

1.  5

2.  -5

3.  8

4.  16

4

-5

Explanation :
No Explanation available for this question

# Two pillars stand on a horizontal plane. A and B are two points on the line joining the bases of the pillars. The angles of elevation of the tops of the pillars as seen from Aare 300 and 600 and as seen from

1.  100 (√3-1), 100 (√3+1), 100√3  mt

2.  15√3, 15(3+√3), 10(√3+1) mt

3.  25√3, 50, 75 mt

4.  10(2+√3), 27 (2+√3), 10(√3+1) mt

4