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Ken can paint a room in 5 hours, and Barbie can paint it in 4 hours. How long will it take if they work together?
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Ken can paint a room in 5 hours, and Barbie can paint it in 4 hours. How long will it take if they work together?

User Krrish Raj
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1 Answer

2 votes
20 hours because 5•4=20
User Pragati Sureka
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