A 10 cm dia steam pipe, carrying steam at 180C, is covered with an insulation (conductivity = 0.6 W/m.C). It losses heat to the surroundings at 30C. Assume a heat transfer co-efficient of 0.8 W/m2.C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be__________________?

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