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Question

The distance of the point (1, 0, 2) from the point of intersection of the line x23=y+14=z212 and the plane x - y + z = 16, is .

A
214
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B
8
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C
321
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D
13
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Solution

The correct option is D 13
A general point on the line is (3λ+2,4λ1,12λ+2)

Substituing this in the planes's equation,
3λ+24λ+1+12λ+2=1611λ=11λ=1

(5, 3, 14) is the point of intersection. Distance between (5,3,14) and (1,0,2) is
d=(51)2+(30)2+(142)2=16+9+144=169=13


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