此时水的高度是多少
- 时间:2020-05-27 19:09:25
- 分类:数学世界
- 阅读:139 次
群中“沉默地诠释友情”同学提问:将底面直径2厘米的圆柱形容器内装满10厘米深的水,然后倒入底面直径3厘米的圆柱形容器内,当两容器内水高度相同时,此时水的高度是多少?最好不是用方程解,谢谢!
数学题解答:题目有些难度,还是先看看用方程怎么做吧!数量关系:两个容器中水的体积之和等于原来水的体积。解:设此时水的高度是x厘米。
3.14×(2÷2)2×x+3.14×(3÷2)2×x=3.14×(2÷2)2×10
x=40/13
答:此时水深是40/13厘米。
“沉默地诠释友情”:我想出了算术方法,大家看看对不对:用水的体积除以两个底面面积之和就可以了。
半径:2÷2=1cm
半径:3÷2=1.5cm
水的体积:1×1x3.14×10=31.4(立方厘米)
此时水的高度:31.4÷(1×1x3.14+1.5×1.5×3.14)=40/13(厘米)
推荐阅读:5 Tips for Capturing More Leads on Your Blog Don’t Fall Victim to the Content Overproduction Trap Are You Taking Advantage Of These Free WordPress Marketing Plugi What Content Marketers Can Learn from Game of Thrones All You Need To Know About How Small Business Should Handle Soci Should You Add Live Chat to Your Blog? Food Blogger Accuses Fast Food Giant Of Stealing His Recipe Back To School 2016: How To Rock (And Profit) With Sales And Mar The Five Fundamentals to Creating a Powerhouse Blog Blog On The Go With These Mobile Apps
- 评论列表
-
- 添加评论