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A ship A is moving westwards with a speed of 10 km/h and a ship B 100 km

A ship A is moving westwards with a speed of 10 km/h and a ship B 100 km South of A is moving Northwards with a speed of 10 km/h. The time after which the distance between them becomes shortest is

Options

(a) 5 h
(b) 5√2 h
(c) 10√2 h
(d) 0 h

Correct Answer:

Explanation:

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