Question
The length of copper pipe A is 45 of the length of copper pipe D and the length of copper pipe D is 34 of the length of copper pipe B and 35 of the length of copper pipe C. What fraction of the total length of the 4 copper pipes is copper pipe B?
3 m

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The length of copper pipe A is 45 of the length of copper pipe D and the length of copper pipe D is 34 of the length of copper pipe B and 35 of the length of copper pipe C. What fraction of the total length of the 4 copper pipes is copper pipe B?