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Question

If P = (15,2) be a point and L = x12=y21=z31=r be a line if PQ is the distance of plane 2x+yz1=0 from P measured along a line inclined at an angle of 60o with line L and is minimum, then PQ is equal to

A
1 unit
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B
23 units
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C
2 units
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D
5 units.
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Solution

The correct option is A 1 unit
P = (15,2) be a point
and L = x12=y21=z31=r be a line
PQ is the distance of plane 2x+yz1=0 from P
measured along a line inclined at an angle of 60o with line L and is minimum,
PQ is equal to 1 units


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