Question
Tommy and Ethan take 6 days to assemble a toy plane. Ethan and Jack take 3 days to build the same plane while Tommy and Jack 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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Tommy and Ethan take 6 days to assemble a toy plane. Ethan and Jack take 3 days to build the same plane while Tommy and Jack take only 4 days. How many complete days would the three of them take to build the same toy plane?