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    Edexcel D1 exercise 3E question 6 part b is what I need help on. 4500m is old minimum total cable length. The FG road is now 400m longer, so minimum total cable length is 400m longer, making it 4900m now, right?

    Thanks for any help
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    (Original post by krisshP)
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    Not got the book. And the answer may depend on the results of the previous part too.
 
 
 

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