Question: Water is flowing inside a 12-cm-diameter and 20-m-long pipe. The water enters the pipe at 80C and leaving the pipe at 64C. The flow rate

Water is flowing inside a 12-cm-diameter and 20-m-long pipe. The water enters the pipe at 80C and leaving the pipe at 64C. The flow rate of water in the pipe is 0.2 m/min. Determine the surface temperature of this pipe.

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