GMAT 考满分题库

- 数学PS -
The iron factory melts a cylinder with a diameter of 30 meters and a height of 20 meters into nine small cylinders of equal volume and 20 meters each in height. What is the diameter of the small cylinder?
  • A15
  • B12
  • C10
  • D6
  • E5
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正确答案: C

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