26号的一道JJ

新鲜的苹果100POUNDS,CONTAIN WATER WAS 99%,如果经过几天晒干,ENOUGH WATER被蒸发,苹果的含量不变,那么CONTAIN WATER WAS 98%,问这几天晒干后,苹果重多少??
答案:50 (有80,70,60,50,40)

Rank: 1

3^#

hilisa发表于 2002-12-29 08:53 | 只看该作者

100 pound original with 99% water, so apple flesh is 1 pound, suppose apple is total x pound after drying, then (x-1)/x = 98%, => x = 50

Rank: 3 Rank: 3

2^#

lisaislisa发表于 2002-12-28 22:43 | 只看该作者

can not understand ...
sorry it means the apple losses 1% water ??
seems not so...then ....??

^^

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