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A man, the surface area of whose skin is...

A man, the surface area of whose skin is `2m^(2)` , is sitting in a room where air temperature is `20^(@)C` if his skin temperature is `28^(@)C` and emissivity of his skin equals 0.97, find the rate at which his body loses heat.

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The correct Answer is:
`92.2 W`
`e sigma A(T^(4)-T_("surroundings"))`
`= 0.97 xx 5.67 xx 10^(-8) 2 (301^(4) - 293^(4))`
`= 92.2 W`
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