Question: A water line is to be built from point P to point Sand must pass through regions where construction costs differ (see figure). The cost

A water line is to be built from point P to point Sand must pass through regions where construction costs differ (see figure). The cost per kilometer (in dollars) is 3k from P to Q, 2 k from Q to R, and k from R to S. Find x and y such that the total cost C will be minimized.

3+2/3 (x, y) - 0.5, 2 km I km 10 km-

3+2/3 (x, y) - 0.5, 2 km I km 10 km-

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