压路机的滚筒是一个圆柱

  • 时间:2020-05-23 15:41:47
  • 分类:数学世界
  • 阅读:136 次

压路机问题:压路机的滚筒是一个圆柱,它的宽为2米,半径为0.5米,压路机向前滚动100周,压过的路面有多大?

本题由资优网老师数学题解答:压路机的滚筒是圆柱形,滚筒与地面相接触的是它的侧面,所以算压过的路面有多大,需要先算出圆柱的侧面积,再乘100(因为它滚了100周,所以是侧面积的100倍)。

滚筒的侧面积=底面周长×高,算式如下:

3.14×0.5×2 × 2 = 6.28(平方米)

压过的路面面积:

6.28×100=628(平方米)

答:压过的路面的面积是628平方米。

推荐阅读:
Algorithms to Determine a Palindrome Number  Algorithm to Compute the Fraction to Recurring Decimal of the Tw  Algorithms to Check if Array Contains Duplicate Elements  Recursive Depth First Search Algorithm to Compute the Sum of Nod  How to Convert Integer to the Sum of Two No-Zero Integers?  Algorithm to Generate the Spiral Matrix in Clock-wise Order  How to Remove the Duplicates from Sorted List (Leaving Only Dist  How to Sort a Linked List by Converting to Array/Vector?  Know The Effective and Smart SEO Reporting Tool You Must Use  Pro Content Marketing Tips You Can Implement NOW 
评论列表
添加评论