[" Question 20.A brass boiler has a base area 0.15"m^(2)" and thickness "],[1.0cm" .It boils water at the rate of "6.0kg/min" when placed on a gassfore "],[" Estimate the temperature of the part of the flame in contact with the "],[" boile.Thermal conductivity of brass "=10gJ/s-K" ."],[" (Heat of vapourization of water "=2256times10^(3)J/kg)]