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:151 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 Reverse Words in a String using Modern Programming Langua  The Python Function to Retrieve the Producer Reward for Witness  Function to Compute the Average Salary Excluding the Minimum and  Efficient Algorithms to Compute The kth Factor of a Natural Numb  Can We Make Arithmetic Progression From Sequence of Numbers?  How to SSH to Remote Host using the Priviate/Public Keys Authent  How do you Test Getter and Setter Interface in Java using Mockit  Using Java’s Big Integer to Compute the Large Sum of One-h  IoT Security: Real Problems and Solutions  Set Up Website Health Checks (Canaries) using CloudFlare 
评论列表
添加评论