On a map with a scale of 1:50000000, the distance between A and B is 2.5 cm. At 8:30 am, a plane flies from A to B and arrives at 10:30 am. How much does the plane travel per hour? km?
在比例尺是1：50000000的地图上，量得甲乙两地的距2.5厘米，上午8点30分有一架飞机从甲地飞往乙地，上午10点30分到达，这架飞机每小时行多少千米？
<gadget id="calculator">1_250 / 2</gadget>
<output>625</output>

<result>625</result>