把圆柱削成一个最大的圆锥求削去部分体积

  • 时间:2020-05-05 19:39:23
  • 分类:数学世界
  • 阅读:139 次

数学题:一个圆柱形木块,底面积是5平方分米,高是8分米,把它削成一个最大的圆锥,削去部分的体积是多少?

圆柱削成圆锥

数学题解答:削成最大的圆锥,就是说圆锥要与圆柱等底等高。这样的话,如果把圆锥的体积看成1份,则圆柱体积是3份,那么削去部分的体积就是2份。

可以先求出圆柱的体积:5×8=40(立方分米)

再算削去部分的体积:40÷3×2= 80/3(立方分米)

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