数学题：一个圆锥形沙堆，底面半径为1米，高为4.5分米，用这堆沙在5米宽的公路上铺2厘米厚的路面，可以铺几米？

数学题解答：做这道题一定要注意统一单位名称！不然即便知道了方法，也容易弄错。

将单位名称统一为“米”。

4.5分米＝0.45米，2厘米＝0.02米。

先算出圆锥形沙堆的体积：3.14×1¹×0.45÷3=0.471（立方米）

算出可以铺几米远？0.471÷5÷0.02=4.71（米）

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