2. 外语
  3. The rectangular box shown above has been wrapped with two tapes, each going once around the box without overlap and running para

The rectangular box shown above has been wrapped with two tapes, each going once around the box without overlap and running para

admin2009-05-19  94
问题
The rectangular box shown above has been wrapped with two tapes, each going once around the box without overlap and running parallel to the edges of the box. How many centimeters of tape were used on the box?
选项 A、70
B、80
C、120
D、140
E、150
答案E
解析 上图所示长方体盒子被两条胶带捆住，每条胶带无重叠地缠绕长方体盒子一圈，且与长方体盒子的边缘相平行。问包盒子共用了多长的胶带?
解：本题的正确答案为(E)。该题实际上是让考生求长方体盒子的两个矩形周长的和，因此带长等于：2×(20+15)+2×(25+15)=l50 cm
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