A hunter is at (4, -1, 5) units. He observes two preys at P 1 (-1, 2, 0) units and P 2 (1, 1, 4), respectively. At zero instant he starts moving in the plane of their positions with uniform speed of 5 units s -1 s in a direction perpendicular to line P 1 P 2 till he sees P 1 and P 2 collinear at time T. Time T is
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Verified by ExpertsThe correct answer is:
A
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Now 
Time taken to reach destination
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