### Home > CALC > Chapter 9 > Lesson 9.1.2 > Problem 9-26

9-26.

A square plot of land * *to a point

*on*

*, and from there to point*

*. (Point*

*cannot be point*

*or point*

*.) The cost of laying the pipe is*

Let .

Now write expressions for

*and*

*.*

The function for the cost is

*.*

Once you have written the cost function in terms of

*, differentiate and determine the value of*

*that yields a minimum.*

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Note: This is not the answer to the question being asked.