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The fixed cost for a steam line per/meter of pipe is $450X + $50 per year

Mechanical Engineering

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The fixed cost for a steam line per/meter of pipe is $450X + $50 per year. The cost for loss of heat from the pipe per meter is $4.8/√? per year. Here, X represents the thickness of insulation in meters, and X is a continuous design variable. What is the optimal thickness of the insulation? Show your calculations