唔該數學高手~中2比數~
a is 25% less than b.
a is 70% less than c.
find a:b:c
唔該數學高手~中2比數~
2007-01-09 2:29 am
回答 (6)
2007-01-09 2:35 am
✔ 最佳答案
假設a是1b就是（1+25%）=1.25
c就是（1+70%）=1.7
1:1.25:1.7
=20:25:34
2007-01-08 18:37:10 補充：
b應該是1x（1 25%）=1.25c應該是1x（1 70%）=1.7
2007-01-09 8:18 am
0.75a=b
0.3a=c
a:100/75b:10/3c
225a:300b:750c
9a:12b:30c
3:4:10
0.3a=c
a:100/75b:10/3c
225a:300b:750c
9a:12b:30c
3:4:10
2007-01-09 3:29 am
Let a =12
b= 12/(1-0.25) =16
c = 12/(1-0.7) = 40
so a:b:c=12:16:40 =3:4:10#
b= 12/(1-0.25) =16
c = 12/(1-0.7) = 40
so a:b:c=12:16:40 =3:4:10#
參考: me
2007-01-09 2:41 am
let a=x
b= x/ 1-25% = 1.333333333x
c= x/1-70% = 3.333333333x
(a= 1 x 3 = 3
b=1.333333333333 x 3 = 4
c=3.3333333333 x 3 = 10 )
so a:b:c = 3:4:10
2007-01-08 18:46:33 補充：
大家留意問題係a is 25% less than b 姐係ａ 比 ｂ少２５％
2007-01-08 18:58:29 補充：
係唔等於ｂ比ａ大２５％
b= x/ 1-25% = 1.333333333x
c= x/1-70% = 3.333333333x
(a= 1 x 3 = 3
b=1.333333333333 x 3 = 4
c=3.3333333333 x 3 = 10 )
so a:b:c = 3:4:10
2007-01-08 18:46:33 補充：
大家留意問題係a is 25% less than b 姐係ａ 比 ｂ少２５％
2007-01-08 18:58:29 補充：
係唔等於ｂ比ａ大２５％
參考: 自己
2007-01-09 2:35 am
b=a(1+25%)=1.25a
c=a(1+70%)=1.7a
a:b=a:1.25a
=1:1.25
=100:125
4:5
=20:25
b:c=1.25a:1.7a
=125:170
=25:34
a:b:c=20:25:34
hope can help u la =]
c=a(1+70%)=1.7a
a:b=a:1.25a
=1:1.25
=100:125
4:5
=20:25
b:c=1.25a:1.7a
=125:170
=25:34
a:b:c=20:25:34
hope can help u la =]
參考: me =]
2007-01-09 2:33 am
b=25%b/a
c=70%c/a
a=95%bc/a
c=70%c/a
a=95%bc/a
收錄日期: 2021-04-13 18:02:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070108000051KK03053