Distance between the is and the plane 2x + 2y - z = 6, is
9 unit
1 unit
2 unit
3 unit
D.
3 unit
Let point (1,- 2, 1) lies on this line.
The required distance is the length of perpendicular from the point (1, - 2, 1) to the plane 2x + 2y - z - 6 = 0.
If (1, 1, 1), (1, - 1, 1), (- 7, - 3, - 5) and (p, 2, 3) are coplanar, then the value of p will be
5
3
2
None of these
If the position vectors ofthe points A and B are and respectively, then the position vector of the mid-point of AB is
The coordinates of foot of perpendicular drawn from the origin on the line formed by joining the points (- 9, 4, 5)and (10, 0, - 1), are
(- 3, 2, 1)
(1, 2, 2)
(4, 5, 3)
None of these
If the direction cosines of two lines are represented by l + m + n = 0 and 2lm + 2nl - mn = 0, then the angle between these lines will be
None of these
The direction ratios of the diagonals of a cube which joins the origin to the opposite corner are (when the 3 concurrent edges of the cube are coordinate axes)
1, 1, 1
2, - 2, 1
1, 2, 3