Two lines whose equation are L1:x−32=y−23=z−1λ and L2:x−23=y−32=z−23 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 A3 Lines are coplanar if ∣∣
∣∣−11123λ323∣∣
∣∣=0 ⇒20−5λ=0⇒λ=4 Any point on L1 is (3+2r,2+3r,1+4r) x+y+z=6+9r=15⇒r=1 So, P is (5, 5, 5). Distance from (3,4,3)=√22+11+22=3