共需油漆多少千克

  • 时间:2020-05-27 19:06:25
  • 分类:数学世界
  • 阅读:154 次

省艺术宫里面有8根圆柱,每根柱子的底面半径是0.35m,高是30m。先要给这些柱子涂上油漆,如果每平方米用油漆0.25kg,共需油漆多少千克?

数学题解答:需用油漆多少千克和柱子涂油漆的面积有关。柱子上顶天,下立地,所以只有侧面能被涂上颜色。只需算出一根柱子的侧面积,再乘上8,就知道了所有柱子涂油漆的面积,进而可以求出油漆的重量。

侧面积:3.14×0.35×2×30=65.94(平方厘米)

涂油漆总面积:65.94×8=527.52(平方厘米)

油漆重量:527.52×0.25=131.88(kg)

推荐阅读:
Flashing the BIOS of HPZ800 Server to 3.61 Rev.A  Algorithm to Sum The Fibonacci Numbers  How to Adapt Your Blog to Increasing Zero-Click Searches  Understanding Marketing Automation & Its Perks for Your Busi  Adobe Flash Player Nears its EOL, Will this Affect your Blog?  How to Create Unique Content through User Personas  5 Excellent 10x Content Examples To Boost Your Blog Traffic  How to Vlog: A Guide to Start Vlogging in 2020  5 Healthy Lifestyle Blogs to Know This 2020  Young People Changing the World One Idea at a Time 
评论列表
添加评论