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  3. The restaurant owner bought two hundred pounds of potatoes which contain 99% water content. The potatoes are left in the sun for

The restaurant owner bought two hundred pounds of potatoes which contain 99% water content. The potatoes are left in the sun for

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问题 The restaurant owner bought two hundred pounds of potatoes which contain 99% water content. The potatoes are left in the sun for 4 hours. Now the total water content of the potatoes is slightly reduced to 96%. What is the total weight of the potatoes now?
选项 A、194.06 pounds.
B、192.08 pounds.
C、150 pounds.
D、50 pounds.
答案D
解析 假设蒸发掉的水的重量为x，根据题意，可以得出如下方程式：(200×99%-x)/(200-x)=96%。得出x=150，现在土豆的总重量为200-150=50(磅)。
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本试题收录于： A类竞赛（研究生）题库大学生英语竞赛（NECCS）分类
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