A $1,195$ ft$2,4$ in$.$ thick concrete wall has inside and outside surface temperatures of $19$C and $5$C$.$ A $2$ in$.$ insulation batt with a thermal conductivity of

k $=0\mathrm{.}03$ Btu$/($h $$ ft $$F$)$

is added to the wall. Determine the reduction in heat transfer rate.

What is the thickness of the insulation in meters?