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A metallic sphere having radius 0.08 m a...

A metallic sphere having radius `0.08 m` and mass `m = 10 kg` is heated to a temperature of `227^(@)C` and suspended inside a box whose walls ae at a temperature of `27^(@)C`. The maximum rate at which its temperature will fall is:-
(Take `e =1`, Stefan's constant `sigma = 5.8 xx 10^(-8) W//m^(-2)K^(-4)` and specific heat of the metal `s = 90 cal//kg//deg J = 4.2 "Joules"//"Calorie")`

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