28
MCQ (Single Correct Answer)
The point $(-2,-3,-4)$ lies in the
A
first octant
B
seventh octant
C
second octant
D
eight octant
29
MCQ (Single Correct Answer)
A plane is parallel to YZ-plane, so it is perpendicular to
A
$X$-axis
B
$Y$-axis
C
Z-axis
D
None of these
30
MCQ (Single Correct Answer)
The locus of a point for which $y=0$ and $z=0$, is
A
equation of $X$-axis
B
equation of $Y$-axis
C
equation at $Z$-axis
D
None of these
31
MCQ (Single Correct Answer)
The locus of a point for which $x=0$ is
A
$X Y$-plane
B
$YZ$-plane
C
$Z X$-plane
D
None of these
32
MCQ (Single Correct Answer)
If a parallelopiped is formed by planes drawn through the points $(5,8,10)$ and $(3,6,8)$ parallel to the coordinate planes, then the length of diagonal of the parallelopiped is
A
$2 \sqrt{3}$
B
$3 \sqrt{2}$
C
$\sqrt{2}$
D
$\sqrt{3}$