7th Grade Challenging Math
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7-51) Answer
1000g
Solution: The amount of sugar in
the sugar water is 2000*(1-90%)=200g. The amount of water initially is 1800g.
After several days of evaporation, the ratio of sugar to water is 20:80=1:4.
Since the amount of sugar does not change, i.e. still 200g, there is 800g of
water. Therefore, the weight of the sugar water is 1000g.
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