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

A brass boiler has a base area of `0.15m^2` and thickness 1.0 cm it boils water at the rate of `6.0 kg//min`, When placed on a gas. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass`=109 J//s-.^@C` ) and heat of vapourization of water `=2256 J//g`.

`350^(@)C`

`240^(@)C`

`300^(@)C`

`160^(@)C`

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