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Question

Two lines whose equation are L1:x32=y23=z1λ and L2:x23=y32=z23 lie in the same plane. If L1 intersects a plane x+y+z=15 at P, then distance of P from (3, 4, 3) is

A
3
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B
5
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C
10
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D
15
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Solution

The correct option is A 3
Lines are coplanar if ∣ ∣11123λ323∣ ∣=0
205λ=0λ=4
Any point on L1 is (3+2r,2+3r,1+4r)
x+y+z=6+9r=15r=1
So, P is (5, 5, 5). Distance from (3,4,3)=22+11+22=3


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