数学题:用4cm长的线段表示实际距离1200km

  • 时间:2020-06-09 15:19:31
  • 分类:数学世界
  • 阅读:156 次

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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