Circumferential aluminium fins of rectangular profile $(1\mathrm{.}5$ cm wide and $1$ mm thick$)$ are fitted on to a $90$ mm engine cylinder with a pitch of $10$ mm$.$ The height of the cylinder is $120$ mm$.$ The cylinder base temperature before and after fitting the fins are $200\backslash$deg C and $150\backslash$deg C respectively. Take ambient at $30\backslash$deg C and h$($average$)=100$ W$/$m$2$K$.$ Estimate the heat dissipated from the finned and the unfinned surface areas of cylinder body.