一块横截面是正方形的长方体木料
- 时间:2020-05-27 19:06:25
- 分类:数学世界
- 阅读:158 次
“桔子香烟”提问:把一块横截面是正方形的长方体木料,削成一个底面最大的圆柱体。底面直径是两分米,高是四分米。求底面削去的面积是多少?这个圆柱体的表面积是多少?
数学题解答:底面削去的面积用正方形面积减去圆的面积就可以了;圆柱体表面积用圆柱的底面积乘高就行了。
底面削去的面积:2×2 - 3.14×(2÷2)×(2÷2)=0.86(平方分米)
圆柱体表面积:3.14×(2÷2)×(2÷2)×4=12.56(立方分米)
推荐阅读:The Image Smoother Algorithm in C++/Java C++ Algorithm to Remove Outermost Parentheses How to Be Unpopular in the Coding World? How to Search in a Binary Search Tree? How to Determine Sum of Two Square Numbers? The Repeated String Match Algorithm in Javascript How to Implement the String Repeat Function in Javascript? How to Compute the Catalan Number? SQL Left Outer Join Tutorial with Example: Employee Bonus 5 Court Cases Where Social Media Played a Part
- 评论列表
-
- 添加评论