GMAT 考满分题库

- 数学PS -

Daniel takes twice as long to wash dishes than Peter takes to wash the same amount of dishes. At these rates, if Daniel and Peter together wash dishes in 3 hours, how many hours would it take Daniel alone to wash dishes?

  • A3
  • B3.6
  • C6
  • D7.2
  • E12
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正确答案: B

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