植树问题例题解答

  • 时间:2020-04-16 18:10:39
  • 分类:数学世界
  • 阅读:147 次

植树问题例题解答。植树问题:这类应用题是以“植树”为内容。凡是研究总路程、株距、段数、棵数四种数量关系的应用题,叫做植树问题。解题关键:解答植树问题首先要判断地形,分清是否封闭图形,从而确定是沿线段植树还是沿周长植树,然后按基本公式进行计算。

解题规律:

一、沿线段植树:

棵数=段数+1
棵数=总路程÷株距+1
株距=总路程÷(棵数-1)
总路程=株距×(棵数-1)

二、沿周长植树

棵数=总路程÷株距
株距=总路程÷棵数
总路程=株距×棵数

例:沿公路一旁埋电线杆 301 根,每相邻的两根的间距是 50 米 。后来全部改装,只埋了201 根。求改装后每相邻两根的间距。

分析:本题是沿线段埋电线杆,要把电线杆的根数减掉一。列式为 50 ×( 301-1 )÷( 201-1 ) =75 (米)

推荐阅读:
Man Steals ‘Six Figures’ Worth Of Bitcoins From Dark Web Users  The Git Pre-Commit Hook to Avoid Pushing Only Unit Tests In Node  How to Find the Most Common Word in a String with a Banned List?  How to Construct Minimum Spanning Tree using Kruskal or Breadth   Two Pointer and Sliding Window Algorithm to Find K-Length Substr  How to Get the Maximum Level Sum of a Binary Tree using Breadth   Compute the Minimum Costs to Connect the Sticks using Priority Q  Single-Row Keyboard Algorithms to Estimate the Finger Moving Tim  Bruteforce Algorithm to Find the Next Closet Time Reusing the Cu  The Overlapping Rectangles using CSS and Javascript 
评论列表
添加评论