A ship A is moving Westwards with a speed of 10kmh⁻¹ and a ship B 100km South of A is moving northwards with a speed of 10kmh⁻¹. The time after which the distance between them shortest is
A. 0h, 100 km
B. 5h,50√2km
C. 5√2h,50km
D. 10√2h, 50 sqrt km



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