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by bhinton
Mon Jun 01, 2009 3:05 pm
Forum: Arithmetic
Topic: Jon types doc in 40 min, Sue types in 30 min, Jack in 24 min
Replies: 2
Views: 2574

Jon types doc in 40 min, Sue types in 30 min, Jack in 24 min

Jonathan can type a 20 page document in 40 minutes, Susan can type it in 30 minutes, and Jack can type it in 24 minutes. Working together, how much time will it take them to type the same document?

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