1.
如果一個正方形每邊長10%.求他面積的百分增加>?
2.7200存放2又2分之1年的行息是2400.單利息計.開年利率是多少?
百分數.....單利/百分xx
2006-11-21 2:29 am
回答 (3)
2006-11-21 2:33 am
✔ 最佳答案
1. increase in % = 0.1^2 = 0.01%2. 7200(r/100)(2.5) = 2400
r = 40/3 = 13.33333
therefore the interest p.a. = 13.33% (2 d. p.)
你唔明先再問啦 ^v^
2006-11-20 18:46:46 補充：
oh 第一條睇錯題目@.@1. let the side length of square be l original area = l^2 new area = (1.1l)^2 = 1.21l therefore the increase in % of area = (1.21-1)/1 x 100% = 21%
2006-11-22 6:45 am
Ans1. (x+10%)*(x+10%)-x*x除x*x*100%
Ans2. 設年利率是x
2.7200*2.5*x=2400
自己解
=3=
Ans2. 設年利率是x
2.7200*2.5*x=2400
自己解
=3=
2006-11-21 10:40 pm
let the side length of square be l
original area = l^2
new area = (1.1l)^2 = 1.21l
therefore the increase in % of area = (1.21-1)/1 x 100% = 21%
original area = l^2
new area = (1.1l)^2 = 1.21l
therefore the increase in % of area = (1.21-1)/1 x 100% = 21%
參考: me
收錄日期: 2021-04-13 16:25:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061120000051KK02985