A and B are traveling towards each other along the railway line at the same speed. It takes 6 seconds for a train to pass by A, and 5 seconds for the train to pass by B after 4 minutes, then from the time when the train meets B, how many minutes later will A and B meet?
甲、乙两人沿铁路线相向而行，速度相同．一列火车从甲身边开过用了6秒，4分后火车又从乙身边开过用了5秒，那么从火车遇到乙开始，再过多少分甲、乙两人相遇？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/5) + (1/6)</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">(11/30) / 2</gadget>
<output>11/60 = around 0.183333</output>

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) / 2</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(11/60) / (1/60)</gadget>
<output>11</output>

<gadget id="calculator">4 * 11</gadget>
<output>44</output>

<gadget id="calculator">44 - 4</gadget>
<output>40</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<result>20</result>