SOLUTION: Sam can stain his deck in 9 hours. His sister Grace can stain the deck in 12 hours. How many hours will it take them to stain the deck together?
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Question 1010564: Sam can stain his deck in 9 hours. His sister Grace can stain the deck in 12 hours. How many hours will it take them to stain the deck together? Answer by josgarithmetic(39620) (Show Source):
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