Q$2.(7$ pts$.)$ A square cross sectional $(0\mathrm{.}2m0\mathrm{.}2m)$ pipe is routed through a building. Air and building

wall temperatures are at $27C.$ The outside surface temperature of the pipe is $127C$ and the heat transfer

coefficient for free convection $h=10\frac{W}{m^2}.K.$ Determitie the total heat loss rate per unit length from the

pipe surface to the surrounding by convection and radiation $($Given: emissivity $=$ absorptivity $=0\mathrm{.}5$ and $$

$($:$=5\mathrm{.}67{10}^{-8}\frac{W}{m^2}*K^4$