copper plate fins of rectangular cross-section 1mm thick,10mm long,thermal conductivity as 380 w/m.kare attached to a plane wall maintained at a temperature of 230 celcius.the fins dissipate heat by convection into an ambient at 30 celcius with a heat transfer coefficient of 40w/m.m.k.fins are spaced at 8mm.assume negligible heat loss from the tip.calculate 1.fin efficiency 2.area weighted fin efficiency 3.the total heat transfer per area.. plz give me the solution as soon as possible
