A well lagged copper bar has a uniform cross$-$sectional area of $2\mathrm{.}27$ cm $2$ and a length of $6\mathrm{.}09$ cm$.$ A temperature difference of $28\mathrm{.}1$ K exists between the ends of the bar, Given that the thermal conductivity of copper is $401$ W m $-1$ k$-1,$ calculate the heat flow through the bar in steady state $($in W to $1$d$.$p$.)$