Question
Ivan and George take 3 days to assemble a toy train. George and Zeph take 6 days to build the same train while Ivan and Zeph take only 4 days. How many complete days would the three of them take to build the same toy train?
4 m

Click button first when a symbol is required. X

Ivan and George take 3 days to assemble a toy train. George and Zeph take 6 days to build the same train while Ivan and Zeph take only 4 days. How many complete days would the three of them take to build the same toy train?