数学题:一只蚂蚁从墙根竖直向上爬到墙头用了4分钟

  • 时间:2020-04-29 11:52:54
  • 分类:数学世界
  • 阅读:154 次

数学题:一只蚂蚁从墙根竖直向上爬到墙头用了4分钟,从墙头沿原路返回到出发点用了3分钟。若蚂蚁第二分钟比第一分钟多爬1分米,第三分钟比第二分钟多爬1分米,……,整个过程中,每分钟爬过的路程都比前一分钟多1分米,则墙高( )米。(提问者:民风)

数学题解答:此题可用方程来做,等量关系是上与下的总路程是相等的。但不要设墙高,而是设第一分钟爬x米。
上       =   下
x+x+1+x+2+x+3=x+4+x+5+x+6
4x+6=3x+15
x=9

墙高:4x+6=4×9+6=42(米)

推荐阅读:
How to Split a String in Balanced Strings?  Finding Out the Longest Arithmetic Subsequence of Given Differen  How to Count the Prime Number of Set Bits in Binary Representati  How to Create a Mock Echo Soap/REST API using SoapUI?  How to Partition Array into Disjoint Intervals?  The Complex Number Multiplication Function  Beauty Blogger Dies In Freak Accident While On Vacation  5 Killer SEO Posts that You Can Apply on Your Blog This 2017  Here’s How WordPress Is Swallowing Up The Internet  Linden Labs Looks To Create ‘WordPress For Social VR’ 
评论列表
添加评论