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Working alone, Annerose can paint a room in 6 hours. Mike working alone can do the same job in 4 hours. If Annerose and Mike work together, how many hours should it take them to paint the room?

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Working alone, Annerose can paint a room in 6 hours. Mike working alone can do the same job in 4 hours. If Annerose and Mike work together, how many hours should it take them to paint the room?






 
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