Question
If Fabian and Michael paint a house, they take 36 days to finish painting. If Luis and Fabian paint the same house, they take 4 days to finish painting. If Michael and Harry paint the same house, they take 18 days to finish painting. How many days do Luis and Harry take to paint the house if they work together?
4 m

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If Fabian and Michael paint a house, they take 36 days to finish painting. If Luis and Fabian paint the same house, they take 4 days to finish painting. If Michael and Harry paint the same house, they take 18 days to finish painting. How many days do Luis and Harry take to paint the house if they work together?