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Source: Princeton

Level: 3

It takes 6 beavers 10 hours to build a certain dam, working at a uniform rate. If six beavers start to build the same dam at noon, and one beaver per hour is added beginning at 6:00 PM, at what time will the dam be complete?

  • A 0.819444444
  • B 0.833333333
  • C 0.847222222
  • D 0.861111111
  • E 0.875

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