A square pin fin (w-0.6 mm, L-33 mm) is attached to hot surface [87 mm * 69 mm] Ts= 179°C with convection heat transfer coefficient of (116= W/m K and surrounding air at 24°C, if the fin efficiency is 0.81 and the center to center distance between any two successive fins-1.5 mm. What is the overall thermal resistance of the arrangement (m .K/W)

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