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Ship A is sailing towards north-east with velocity  vector v = 30 i + 50 j km/hr where i  points east and j , north. Ship B is at a distance of 80 km east and 150 km north of Ship A and is sailing towards west at 10 km/hr. A will be at minimum distance from B in -

(1) 4.2 hrs  (2) 2.2 hrs  (3) 2.6 hrs  (4) 3.2 hrs

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Correct option  (3) 2.6 hrs

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