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Q.

The points on the line x+11=y+33=z22,  distance (14)  from the point in which the line meets the plane 3x+4y+5z5=0  are:

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a

(0,0,0),(2,4,6)

b

(0,0,0),(2,6,4)

c

(0,0,0),(3,4,5)

d

(2,6,4),(3,4,5)

answer is C.

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Detailed Solution

x+11=y+33=λ

 any point on this line is P(λ1,3λ3,2λ+2) .

If this point lies in the plane 3x+4y+5z5=0,

Then 3λ3+12λ10λ+105=0

 5λ10=0λ=2 .

 Point of intersection of the line and the plane is A(1,3,2) .

It is given that AP=14 .

(λ2)2+(3λ6)2+(2λ+4)2=14

14λ256λ+56=14

λ24λ+3=0λ=1,3

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