24
MCQ (Single Correct Answer)
Distance of the point $(3,4,5)$ from the origin $(0,0,0)$ is
A
$\sqrt{50}$
B
3
C
4
D
5
25
MCQ (Single Correct Answer)
If the distance between the points $(a, 0,1)$ and $(0,1,2)$ is $\sqrt{27}$, ther the value of $a$ is
A
5
B
$\pm 5$
C
$-5$
D
None of these
26
MCQ (Single Correct Answer)
$X$-axis is the intersection of two planes
A
$X Y$ and $X Z$
B
$Y Z$ and $Z X$
C
$X Y$ and $Y Z$
D
None of these
27
MCQ (Single Correct Answer)
Equation of $Y$-axis is considered as
A
$x=0, y=0$
B
$y=0, z=0$
C
$z=0, x=0$
D
None of these
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