GMAT 考满分题库

- 数学PS -
The efficiency of the dam is equal to the ratio of water flow to power generation. When the water flow increases by 40%, the power generation increases by 25%. How much does the efficiency of the dam increase?
  • A8%
  • B10%
  • C12%
  • D18%
  • E24%
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正确答案: C

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