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A brass boiler has a base area of 0.15m^...

A brass boiler has a base area of `0.15m^2 `and thickness `1.0cm`.It boils water at the rate of `6.0kg/min` when placed on a gas stove.Estimate the temperature of the part of the flame in contact with the boiler.Thermal conductivity of brass =`109Js^(-1) m^(-1)K^(-1)`,Heat of vaporisation of water=`2256xx10^3J kg^(-1)`.

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