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:92 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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