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Byju's Answer
Standard XII
Mathematics
Shortest Distance between Two Skew Lines
Consider the ...
Question
Consider the line
L
1
:
x
+
1
3
=
y
+
2
1
=
z
+
1
2
,
L
2
:
x
−
2
1
=
y
+
2
2
=
z
−
3
3
The shortest distance between
L
1
and
L
2
is
A
0
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B
17
√
3
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C
41
5
√
3
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D
17
5
√
3
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Solution
The correct option is
C
17
5
√
3
L
1
:
x
+
1
3
=
y
+
2
1
=
z
+
1
2
L
2
:
x
−
2
1
=
y
+
2
2
=
z
−
3
3
(
x
1
,
y
1
,
z
1
)
≡
(
−
1
,
−
2
,
−
1
)
(
x
2
,
y
2
,
z
2
)
≡
(
2
,
−
2
,
3
)
(
l
1
,
m
1
,
n
1
)
≡
(
3
,
1
,
2
)
(
l
2
,
m
2
,
n
2
)
≡
(
1
,
2
,
3
)
→
b
1
=
l
1
^
i
+
m
1
^
j
+
n
1
^
k
→
b
2
=
l
2
^
i
+
m
2
^
j
+
n
2
^
k
∴
Shortest distance
=
(
→
a
2
−
→
a
1
)
⋅
→
b
1
×
→
b
2
|
→
b
1
×
→
b
2
|
⎡
⎢
⎣
x
2
−
x
1
y
2
−
y
1
z
2
−
z
1
l
1
m
1
n
1
l
2
m
2
n
2
⎤
⎥
⎦
√
(
m
1
n
2
−
n
1
m
2
)
2
+
(
m
2
l
1
−
l
2
m
1
)
2
+
(
n
1
l
2
−
l
1
n
2
)
2
=
17
5
√
3
u
n
i
t
s
Suggest Corrections
0
Similar questions
Q.
Consider the lines:
L
1
:
x
+
1
3
=
y
+
2
1
=
z
+
1
2
and
L
2
:
x
−
2
1
=
y
+
2
2
=
z
−
3
3
.
The unit vector perpendicular to both
L
1
and
L
2
is
Q.
Find the shortest distance between the skew lines :
l
1
:
x
−
1
2
=
y
+
1
1
=
z
−
2
4
l
2
:
x
+
2
4
=
y
−
0
−
3
=
z
+
1
1
Q.
Let
L
1
:
x
−
1
2
=
y
−
2
1
=
z
−
3
1
L
2
:
x
1
=
y
−
1
=
z
−
5
3
The equation of the line perpendicular to
L
1
and
L
2
and passing through the point of intersection of
L
1
and
L
2
is
Q.
Consider the lines
L
1
:
x
+
1
3
=
y
+
2
1
=
z
+
1
2
L
2
:
x
−
2
1
=
y
+
2
2
=
z
−
3
3
The distance of the point
(
1
,
1
,
1
)
from the plane passing through the point
(
−
1
,
−
2
,
−
1
)
and whose normal is perpendicular to both lines
L
1
and
L
2
is
Q.
L
1
:
x
−
1
2
=
y
−
2
3
=
z
−
3
4
L
2
:
x
−
2
3
=
y
−
4
2
=
z
−
5
5
be two given lines, point P lies on
L
1
and Q lies on
L
2
then distance between P and Q can be
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