1.

If a metallic sphere gets cooled from \[{{62}^{o}}C\] to \[{{50}^{o}}C\] in \[{{40}^{o}}C\]and in the next \[10\ \min utes\]gets cooled to \[{{42}^{o}}C\], then the temperature of the surroundings is   [MP PET 1997]

A.            \[{{30}^{o}}C\]                    
B.            \[{{36}^{o}}C\]
C.            \[{{26}^{o}}C\]                    
D.            \[{{20}^{o}}C\]
Answer» D.            \[{{20}^{o}}C\]


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