On a map with a scale of 1:6000000, the length of the road between A and B is 5 cm. Car A drives to City B at an average speed of 65 kilometers per hour, and car B drives to City A at an average speed of 55 kilometers per hour at the same time. How many hours does it take to meet each other?
在一幅比例尺是1：6000000的地图上量得甲、乙两城之间的公路长5厘米．甲车以平均每小时65千米的速度开往乙城，乙车同时以平均每小时55千米的速度开往甲城，需要多少小时才能相遇？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">65 + 55</gadget>
<output>120</output>

<gadget id="calculator">5 / (1/6_000_000) / 100_000 / 120</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>