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A ship A is moving westwards with a speed of 10 km/h .The time after

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

Options

(a) 0 h
(b) 5 h
(c) 5√2 h
(d) 10√2 h

Correct Answer:

5 h

Explanation:

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