NCERT Example 10 - Three Dimensional Geometry
Question: Find the distance between the parallel lines r⃗ = 2î + ĵ − 4k̂ + λ(2î + 3ĵ + 6k̂) and r⃗ = 3î + 3ĵ − 5k̂ + μ(2î + 3ĵ + 6k̂).
Answer: Distance = √293 / 7.
Full step-by-step NCERT solution with diagrams on Something by Zero.