Mathematics, 29.08.2020 03:01 favre22fs

If they work together, Mark and Yvonne can sort 50 library books in 1.5 hours. Working alone, it would take Yvonne 5 hours to do the same job. How long would it take Mark if he worked alone? Express your answer inhours and minutes.

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If they work together, Mark and Yvonne can sort 50 library books in 1.5 hours. Working alone, it wou...