A glass container with an insulating cover with a surface area of (R + 160) cm2 and (R+11) mm thick is filled with ice at 0° C and placed in a second vessel maintained at a temperature of (R +70)° C. Find the mass of the ice that melts per minute when the flow of heat becomes steady. Specific latent heat of ice = 3.36 × 105 J/kg and K for glass is 1 W/mK. when R= 9.

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