1. An engineer is designing a pipeline which is supposed to connect two points P

Question

1.

An engineer is designing a pipeline which is supposed to connect two points P and S. The engineer decides to do it in three sections. The first section runs from point P to point Q, and costs $52 a mile to lay, the second section runs from point Q to point R and costs $42 mile , the third runs from point R to point S and costs $36 a mile. Looking at the diagram below, you see that if you know the lengths marked x and y, then you know the positions of Q and R. Find the values of x and y which minimize the cost of the pipeline.

Explanation / Answer

C = 52 sqrt(2

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