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Let (α, β, γ) be the co-ordinates of the foot of the perpendicular drawn from the point (5,4,2) on the line \vecr = (-\hati + 3\hatj + \hatk) + \lambda(2\hati + 3\hatj - \hatk). The length of the projection of the vector α \hati + β \hatj + γ \hatk on the vector 6\hati + 2\hatj + 3\hatk is: | Watch the step-by-step video solution for this NIMCET PYQ.