A hot surface at $102C$ is to be cooled by attaching $3-cm-$long, $0\mathrm{.}25-$cm$-$diameter

aluminum pin fins $(k=237\frac{W}{m}*K)$ to it$,$ with a center$-$to$-$center distance of $0\mathrm{.}6cm.$ The

temperature of the surrounding medium is $28C,$ and the heat transfer coefficient on the

surfaces is $36\frac{W}{m^2}*C.$ Determine the rate of heat transfer from the surface for a

$1-$m xl$-$m section of the plate. Also determine the overall effectiveness of the fins.