A concrete wali $($k$=1\mathrm{.}37$~W$/$m$-$K$)$ of $10$ cm thickness is to be plustered with gypsum ck$=0\mathrm{.}48$~W$/$m$-$K$)$ so that the heat losses from the wall do not exceed $500$ Won when the inner and outer surfaces of the wall are $110\backslash$deg C and $\backslash$pm$0^\{\backslash$circ$\}$C respectively Dotermine the thickness of plastering to be added to the concrete

wall