Mathematics, 20.05.2020 22:08 lolo8787
Mary can type six letters in 20 minutes, Maggie can type five letters in 20 minutes, and Su Ying can type two letters in 20 minutes. Working together, and assuming that each letter is of the same length, how many minutes will it take them to type 45 letters?
Answers: 1
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Mary can type six letters in 20 minutes, Maggie can type five letters in 20 minutes, and Su Ying can...
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