2a =5b=4c
find a:b:c
P.S.:一定要列式
math(easy)
2007-10-28 9:26 pm
回答 (2)
2007-10-28 9:30 pm
✔ 最佳答案
2a = 5b = 4cConsider 2a = 5b, a/b = 5/2, so a : b = 5 : 2 ... [1]
Consider 5b = 4c, b/c = 4/5, so b : c = 4 : 5 ... [2]
From [1], a : b = 5 : 2 = 10 : 4 .. [3]
Combining [2] and [3],
a : b : c = 10 : 4 : 5
2007-10-28 9:31 pm
2a =5b=4c
2a=5b
a/b = 5/2, i.e. a:b = 5:2
5b=4c
b/c = 4/5, i.e. b:c = 4:5
a:b = 5:2
b:c = 4:5
-------------------
a:b:c = 20:8:10 = 10:4:5
2a=5b
a/b = 5/2, i.e. a:b = 5:2
5b=4c
b/c = 4/5, i.e. b:c = 4:5
a:b = 5:2
b:c = 4:5
-------------------
a:b:c = 20:8:10 = 10:4:5
收錄日期: 2021-04-13 14:13:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071028000051KK01957