作者evanescense (是时候了)
看板GMAT
标题Re: [计量] 数学261
时间Fri Sep 19 20:18:46 2008
※ 引述《thdkuo (thdkuo)》之铭言：
: There are 100 pounds of fruit and water in the fruit is 99% by weight.
: After the fruit are dried and some water evaperates,
: water in the fruit is 98% by weight.
: How does the water weigh after the fruit are dried.
: 答案似乎是50的样子
: 不过这题到底在问什麽，有点看不懂
: weight应该是重量而不是权数吧???
100磅的里面有99磅的水
设蒸发了X磅的水
则 (99-X)/(100-X)=0.98
则 X=50
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