Question
The length of copper pipe K is 45 of the length of copper pipe N and the length of copper pipe N is 13 of the length of copper pipe L and 13 of the length of copper pipe M. What fraction of the total length of the 4 copper pipes is copper pipe M?
3 m

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The length of copper pipe K is 45 of the length of copper pipe N and the length of copper pipe N is 13 of the length of copper pipe L and 13 of the length of copper pipe M. What fraction of the total length of the 4 copper pipes is copper pipe M?