A solid copper cube of edges \[1\ cm\] is suspended in an evacuated enclosure. Its temperature is found to fall from \[{{100}^{o}}C\] to \[{{99}^{o}}C\] in \[100\ s\]. Another solid copper cube of edges \[2\ cm\], with similar surface nature, is suspended in a similar manner. The time required for this cube to cool from \[{{100}^{o}}C\] to \[{{99}^{o}}C\] will be approximately [MP PMT 1997]

A solid copper cube of edges \[1\ cm\] is suspended in an evacuated en

1.	A solid copper cube of edges \[1\ cm\] is suspended in an evacuated enclosure. Its temperature is found to fall from \[{{100}^{o}}C\] to \[{{99}^{o}}C\] in \[100\ s\]. Another solid copper cube of edges \[2\ cm\], with similar surface nature, is suspended in a similar manner. The time required for this cube to cool from \[{{100}^{o}}C\] to \[{{99}^{o}}C\] will be approximately [MP PMT 1997]
A.	\[25\ s\]
B.	\[50\ s\]
C.	\[200\ s\]
D.	\[400\ s\]
Answer» D. \[400\ s\]