求助~一道prep上的data sufficient

yxlam · 发表于 2010-5-11 21:09:15

The cost of a square slab is proportional to its thickness and also proportional to the square of its length. What is the cost of a square slab that is 3 meters long and 0.1 meter thick?
1.The cost of a square slab that is 2 meters long and 0.2 meter thick is $160 more than the cost of a square slab that is 2 meters long and 0.1 meter thick.
2.The cost of a square slab that is 3 meters long and 0.1 meter thick is $160 more than the cost of a square slab that is 2 meters long and 0.1 meter thick.
答案是D 我选的是C
望NN鼎力相助~
p.s.真杯具..贴个图找了好多地方最后还是手打好了 T T

求助~一道prep上的data sufficient

所属分类: GMAT考试

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