Liquid is filled in a vessel which is kept in a room with temperature \[{{20}^{o}}C\]. When the temperature of the liquid is \[{{80}^{o}}C\], then it loses heat at the rate of \[60\ cal/\sec \]. What will be the rate of loss of heat when the temperature of the liquid is \[{{40}^{o}}C\] [MP PMT 1994]

• A.            \[180\ cal/\sec \]                
• B.            \[40\ cal/\sec \]
• C.            \[30\ cal/\sec \]                  
• D.            \[20\ cal/\sec \]