Mathematics
Mathematics, 28.12.2019 22:31, Tyrant4life

Cindy can type 60 words per minute. she took 3 hours to type a certain document. bob can type 20 words per minute. how long will he take to type the same document?

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Cindy can type 60 words per minute. she took 3 hours to type a certain document. bob can type 20 wor...

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