如图,在△ABC中,AB=12mm,BC=24mm,动点P从点A开始延边AB向B以2mm/s的速度移动(不与点B重合),动点Q从点B开始延边BC向C以4mm/s的速度移动(不与点C重合).如果P,Q分别从A,B同时出发,请问经过多少秒,
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![如图,在△ABC中,AB=12mm,BC=24mm,动点P从点A开始延边AB向B以2mm/s的速度移动(不与点B重合),动点Q从点B开始延边BC向C以4mm/s的速度移动(不与点C重合).如果P,Q分别从A,B同时出发,请问经过多少秒,](/uploads/image/z/4326450-42-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3D12mm%2CBC%3D24mm%2C%E5%8A%A8%E7%82%B9P%E4%BB%8E%E7%82%B9A%E5%BC%80%E5%A7%8B%E5%BB%B6%E8%BE%B9AB%E5%90%91B%E4%BB%A52mm%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E7%A7%BB%E5%8A%A8%EF%BC%88%E4%B8%8D%E4%B8%8E%E7%82%B9B%E9%87%8D%E5%90%88%EF%BC%89%2C%E5%8A%A8%E7%82%B9Q%E4%BB%8E%E7%82%B9B%E5%BC%80%E5%A7%8B%E5%BB%B6%E8%BE%B9BC%E5%90%91C%E4%BB%A54mm%2Fs%E7%9A%84%E9%80%9F%E5%BA%A6%E7%A7%BB%E5%8A%A8%EF%BC%88%E4%B8%8D%E4%B8%8E%E7%82%B9C%E9%87%8D%E5%90%88%EF%BC%89.%E5%A6%82%E6%9E%9CP%2CQ%E5%88%86%E5%88%AB%E4%BB%8EA%2CB%E5%90%8C%E6%97%B6%E5%87%BA%E5%8F%91%2C%E8%AF%B7%E9%97%AE%E7%BB%8F%E8%BF%87%E5%A4%9A%E5%B0%91%E7%A7%92%2C)
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