Question
Neave and Eric take 3 days to assemble a toy plane. Eric and Archie take 6 days to build the same plane while Neave and Archie take only 4 days. How many complete days would the three of them take to build the same toy plane?
4 m

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Neave and Eric take 3 days to assemble a toy plane. Eric and Archie take 6 days to build the same plane while Neave and Archie take only 4 days. How many complete days would the three of them take to build the same toy plane?