更新1:
The baker has instructed you to mix 0.75 liters of a 70% egg solution with a 1.5 L solution of a 40% egg solution. show the strength of the final solution.
How do you do this math problem? Show your work?
回答 (2)
2016-07-31 11:25 am
✔ 最佳答案
Strength of the final solution= (0.75 × 70% + 1.5 × 40%) / (0.75 + 1.5)
= 50%
2016-07-31 12:24 pm
(3/4) l of 70% egg soln contains 70% of (3/4) l of e soln = (7/10)(3/4) l of
e soln = (21/40) l of e soln. (1.5) l of 40% e soln contains (2/5)(1.5) l of e soln = (24/40) l of e soln. So (45/40) l of e soln are contained in the
(3/4 + 1,5) l mixture and the %-age of e soln in the mixture is given by
100(45/40)/(2.25)% = (4500/90)% = 50%.
e soln = (21/40) l of e soln. (1.5) l of 40% e soln contains (2/5)(1.5) l of e soln = (24/40) l of e soln. So (45/40) l of e soln are contained in the
(3/4 + 1,5) l mixture and the %-age of e soln in the mixture is given by
100(45/40)/(2.25)% = (4500/90)% = 50%.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160731032218AAbxMYy