数学题:在一幅地图上，用4cm长的线段表示实际距离1200km，那么一条长1560km的高速公路，在这幅地图上长是多少厘米？（关于比例尺的应用题）

数学题解答：图上距离:实际距离＝比例尺，题中的比例尺是一定的，所以图上距离和实际距离成正比例关系。

先化好单位：（注：km＝千米，cm＝厘米）

1200km = 120000000cm

1560km = 156000000cm

设在这幅地图上长是x厘米。

x:156000000=4:120000000

x=5.5

答：在这幅地图上长是5.5厘米。

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