A calorimeter of mass 0.2 kg and specific heat 900 J/kg-K. Containing 0.5 kg of a liquid of specific heat 2400J /kg-K. Its temperature falls from \[{{60}^{o}}C\,\text{to}\,\,\text{5}{{\text{5}}^{\text{o}}}C\] in one minute. The rate of cooling is [MP PET 2003]

• A.            5 J/s                                         
• B.            15 J/s
• C.            100 J/s                                    
• D.            115 J/s