Mathematics, 31.08.2019 15:30 mazielynn84

Kalon and his friend marna own a chimney sweep service company. working together, they can clean a chimney in 1 5/7 hours. if it takes kalon 4 hours to clean a 20-foot chimney by himself, how long does it take marna to clean the same size chimney by herself?

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Kalon and his friend marna own a chimney sweep service company. working together, they can clean a c...