标题:
确认一题!
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作者:
yuezhuo
时间:
2002-12-21 23:59
标题:
确认一题!
366.A mixture is composed of 5 gallons of water and 5 gallons of antifreezer. Now use 3 gallons of the mixture and add 3 gallons of antifreezer to the mixture. What is the percentage of antifreezer in the mixture now?
[确认] 65%
KEY 是７５％＝（３＊５０％＋３）／（３＋３）
虽然有人解释了,但我还是不明白啊,应该是75%才对啊?[em27]
作者:
suse
时间:
2002-12-22 01:39
同意75%
作者:
chnp
时间:
2002-12-22 14:06
老外的傻题，两种不同的液体混合在一起，体积怎么可能是直接相加？
[此贴子已经被作者于2002-12-22 14:06:06编辑过]
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