A steam pipe $($o$.$d$.=10$ cm$,$ Ts $=500$ K$,$ $=0\mathrm{.}8)$ passing through a large room at $300$ K$.$ The pipe loses heat by natural convection $($h $=15$ W$/$m$2$K$)$ and radiation. To find: $($i$)$ The surface emissive power of the pipe, $($ii$)$ the total radiation falling upon the pipe, and $($iii$)$ the total rate of heat loss from the pipe