$7.$ A fin is made of aluminum, and its thermal conductivity is $180$ W$/$mK$.$ The fins cross$-$sectional area is $6$ cm$^2$ and its length is $40$ cm$.$ The fin is exposed to air at a temperature of $30\backslash$deg C$,$ and its base temperature is $100\backslash$deg C$.$ The convective heat transfer coefficient between the fin and air is $25$ W$/$m$^2$K$.$ Calculate the rate of heat transfer through the fin.

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A problem in heat transfer To calculate the rate of heat transfer through th... View the full answer