2. 外语
  3. How much longer is the edge of a cube with a surface area of 1,350 than the edge of a cube with a surface area of 600?

How much longer is the edge of a cube with a surface area of 1,350 than the edge of a cube with a surface area of 600?

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问题 How much longer is the edge of a cube with a surface area of 1,350 than the edge of a cube with a surface area of 600?
选项 A、5
B、15
C、150
D、250
E、750
答案A
解析 设正方体的边长为a，表面S=6a2，那么a==15-10=5。
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