Mathematics, 19.07.2019 13:10, Hannahmiller3773

Working alone, natalie can clean an attic in 9 hours. lea can clean the same attic in 8 hours. how long would it take them if they worked together? work it out ! a) 5.47 hours b)3.78 hours c)4.74 hours d)4.24 hours

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Working alone, natalie can clean an attic in 9 hours. lea can clean the same attic in 8 hours. how l...