GMAT 考满分题库

- 数学PS -
It takes 4.5 hours for car A to travel 270 miles and car B travels the same distance at a speed of 10 mile/h. How many hours less does it take for car A to travel the whole distance than car B?
  • A21
  • B21.5
  • C22
  • D22.5
  • E23
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正确答案: D

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