ship travels from port A to port B at a speed of 40 kilometers per hour. After traveling 20% of the whole journey, it travels for another 3 minutes. At this time, the ratio of the distance traveled to the distance traveled is 1:3. How many kilometers are there between the two ports of B and B?
一艘轮船以每小时40千米的速度从甲港开往乙港，行了全程的20%后，又行驶了3分钟，这时未行路程与已行路程的比是1：3，甲、乙两港相距多少千米？
<result>400</result>