请教陈向东的数学题

shevit · 发表于 2011-5-19 15:33:08

A square countertop has a square tile inlay in the center,leaving an untiled strip of uniform width around the tile. If the ratio of the tiled area to the untiled area is 25 to 39, which of the following could be the width ,in inches, of the strip?1;3;4A ,1 onlyB,3 onlyC,1 and 3 onlyD,1 and 4 onlyE,1,3 and 4the answer is E

shevit · 发表于 2011-5-22 12:58:17

就是说任何答案都可以咯？只要按比例

BEARhx · 发表于 2011-5-20 11:33:11

个人认为：
the ratio of the tiled area to the untiled area is 25 to 39，没有其他限制条件，所以不用算就可得到the width of the strip可以为任何数，就算换成4，5，8应该也没问题吧！

shevit · 发表于 2011-5-20 11:16:04

木有人会么？？？？？顶上来

请教陈向东的数学题

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