A metallic sphere having radius 0.08 m and mass m = 10 kg is heated to a temperature of \[227{}^\circ C\] and suspended inside a box whose walls are at a temperature of \[27{}^\circ C\]. The maximum rate at which its temperature will fall, is (Take \[e=1,\] Stefan's constant \[\sigma =5.8\times {{10}^{-8}}W{{m}^{-2}}{{K}^{-4}}\] and specific heat of the metal \[s=90\,cal/kg/\deg ,\,J=4.2\] joules/calorie)

A metallic sphere having radius 0.08 m and mass m = 10 kg is heated to

1.	A metallic sphere having radius 0.08 m and mass m = 10 kg is heated to a temperature of \[227{}^\circ C\] and suspended inside a box whose walls are at a temperature of \[27{}^\circ C\]. The maximum rate at which its temperature will fall, is (Take \[e=1,\] Stefan's constant \[\sigma =5.8\times {{10}^{-8}}W{{m}^{-2}}{{K}^{-4}}\] and specific heat of the metal \[s=90\,cal/kg/\deg ,\,J=4.2\] joules/calorie)
A.	\[{{0.055}^{o}}C/s\]
B.	\[{{0.066}^{o}}C/s\]
C.	\[{{0.044}^{o}}C/s\]
D.	\[{{0.033}^{o}}C/s\]
Answer» C. \[{{0.044}^{o}}C/s\]