在海岸A处,发现北偏东45°方向,距A处(
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-1)海里的B处有一艘走私船,在A处北偏西75°方向,距A处2海里的C处的缉私船奉命以10
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海里/小时的速度追截走私船,此时走私船正以10海里/小时的速度从B处向北偏东30°的方向逃窜,问缉私船沿什么方向能最快追上走私船,并求出所需要的时间.
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