GMAT 考满分题库

- 数学PS -
The swimming pool will be filled with water whose rate of flow is 50 L/min. The pool is 120 m^3 in total. How many hours is necessary to fill 2/3 of the pool?
  • A50/3
  • B20
  • C70/3
  • D80/3
  • E30
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正确答案: D

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