Question: A 3-m2 hot black surface at 80C is losing heat to the surrounding air at 25C by convection with a convection heat transfer coefficient of

A 3-m2 hot black surface at 80°C is losing heat to the surrounding air at 25°C by convection with a convection heat transfer coefficient of 12 W/m2 • °C, and by radiation to the surrounding surfaces at 15°C. The total rate of heat loss from the surface is
(a) 1987 W
(b) 2239 W
(c) 2348 W
(d) 3451 W
(e) 3811 W

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