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Mathematics, 26.04.2021 22:20 alexciamartinez05
Two sisters, working together can clean the house in 3 hours. The older sister works 3 times faster than the younger sister when cleaning the house. How long will it take the younger sister to finish the same job by herself? Type just the number don't include words
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Two sisters, working together can clean the house in 3 hours. The older sister works 3 times faster...
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