更新1:
比埋條式,唔該
更新2:
盡量中文回答,THX
中三數一問
回答 (2)
2007-09-09 9:20 pm
✔ 最佳答案
Let y be the original area.{[3.14x(1.1y)^2]-(3.14y^2)/3.14y^2}x100%
=3.14x1.21y^2-3.14y^2/3.14y^2x100%
=3.7994y^2-3.14y^2/3.14y^2x100%
=0.6594y^2/3.14y^2x100%
=0.21x100%
=21%
The % cange is 21%
2007-09-09 13:21:23 補充：
The % change is 21%
2007-09-09 9:17 pm
21%!!!
收錄日期: 2021-04-24 09:49:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070909000051KK01797