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hot flue gases at 373oC is flowing theough a circular chimney, 1.2 m outer radius made...

hot flue gases at 373oC is flowing theough a circular chimney, 1.2 m outer radius made from brick with thickness 20 cm. the ambient air is at 27oC. calculate the heat transfer from hot flue gas to ambient air. take convective heat transfer coefficient for the flue gas and ambient air as 50 and 15W/m^K respectively. given chimney height 20 m. tale conductivity of brick wall 10W/mK
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