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Assume all temperatures to be exact.

A steel cylinder of radius 4.5 cm and length 3.3 cm is placed in end-to-end thermal contact with a copper cylinder of the same dimensions. If the free ends of the two cylinders are maintained at constant temperatures of 92 °C (steel) and 13 °C(copper), how much heat will flow through the cylinders in 20 min? Assume k steel=46J/(m⋅s⋅°C)and k copper=390J/(m⋅s⋅°C).

Express your answer using two significant figures.

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