The school's circular runway is 540 meters long. Minmin and Weiwei start from the same place on the circular runway and run in opposite directions. Weiwei runs 4 meters per second, and Minmin runs one meter more than Weiwei per second. People can meet?
学校环形跑道长540米，敏敏与薇薇从环形跑道的同一地点出发，沿着相反的方向跑步，薇薇每秒跑4米，敏敏每秒比薇薇多跑一米，多少时间两人才能相遇？
<gadget id="calculator">4 + 1 + 4</gadget>
<output>9</output>

<gadget id="calculator">540 / 9</gadget>
<output>60</output>

<result>60</result>