GMAT 考满分题库

- 数学PS -
Students A and B skate together. Student A circles with a radius of 10 feet. B circles with a radius of 5 feet. When both A and B finish skating around their respective circles, how much more distance does A skate than B?
  • A20
  • B25
  • C30
  • D35
  • E40
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正确答案: D

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