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  3. A rectangular block of goods is put in a rectangular box of 4 inches by 6 inches by 10 inches. There is a-inch thick material wr

A rectangular block of goods is put in a rectangular box of 4 inches by 6 inches by 10 inches. There is a-inch thick material wr

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问题 A rectangular block of goods is put in a rectangular box of 4 inches by 6 inches by 10 inches. There is a-inch thick material wrapped around the block of goods to protect it and just fit in the box tightly, what is the volume of the block of goods?
选项 A、240
B、320
C、360
D、288
E、135
答案E
解析 货物的形状是长方体，求体积需要知道长、宽、高，1/2 inch厚的材料包在货物外面，然后放到盒子里面刚好塞紧，则货物的长、宽、高分别为(10-1/2×2)=9，(6-1/2×2)=5，(4-1/2×2)=3，因此货物的体积大约为9×5×3=135。
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