Question: A very long copper rod [k = 372 W/m C] 2.5 cm in diameter has one end maintained at 90C. The rod is exposed

A very long copper rod [k = 372 W/m ∙ ºC] 2.5 cm in diameter has one end maintained at 90ºC. The rod is exposed to a fluid whose temperature is 40ºC. The heat-transfer coefficient is 3.5 W/m2 ∙ ºC. How much heat is lost by the rod?

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