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Question 885611: Lala and Baba can finish stacking 200 cups together in 12/5 hrs. One day, Baba stacked by herself. An hour later, Lala joined and they finished the job in 9/5 hrs. If Lala works alone and stacks all 200 cups, how many hours would it take her?
Found 3 solutions by josgarithmetic, josmiceli, MathTherapy: Answer by josgarithmetic(39617) (Show Source): Answer by josmiceli(19441) (Show Source): Answer by MathTherapy(10551) (Show Source):
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Lala and Baba can finish stacking 200 cups together in 12/5 hrs. One day, Baba stacked by herself. An hour later, Lala joined and they finished the job in 9/5 hrs. If Lala works alone and stacks all 200 cups, how many hours would it take her?
It'll take Lala hours to stack cups by herself.
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