The alcholo contents by volume of two drinks are given as follows:
Drink A: Alcohol content 15% Drink B: Alcohol content 8%
At least how much drink A should be added to 3L of drink B, so that there is not less than 10% of alcohol by volume in the mixture?
唔識做功課14
2013-08-06 1:14 am
回答 (1)
2013-08-06 1:52 am
✔ 最佳答案
LetV L be the volume of drink A.Alcohol content of the mixture = (Vx15% + 3x8%) / (V + 3)
(Vx15% + 3x8%) / (V + 3) ≥ 10%
(0.15V + 0.24) / (V + 3) ≥ 0.1
0.15V + 0.24 ≥ 0.1V + 0.3
0.05V ≥ 0.06
V ≥ 0.06/0.05
V ≥ 1.2
Hence, at least 1.2 L of drink Ashould be added.
參考: sioieng
收錄日期: 2021-04-13 19:36:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130805000051KK00238