Maths problem： how to do （c）, Thanks. I knew how to do a, and b .?
回答 (1)
2019-05-09 7:39 pm
✔ 最佳答案
(c) Let unchanged radius = r
Let original & new height = h,H respectively
r:h = 5:4 => h = (4/5) r
r:H = 4:5 => H = (5/4) r
original vol., v = (1/3) r²h = (1/3) r² (4/5) r = (4/15) r³
new vol., V = (1/3) r²H = (1/3) r² (5/4) r = (5/12) r³
下半部貼在意見欄中, 因為一放上去就令全題隱藏了 !
Smile ：請問你看得到意見欄的一半嗎？
收錄日期: 2021-04-24 07:34:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190509030445AAhh8kQ