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A calorimeter of mass 0.2 kg and specifi...

A calorimeter of mass `0.2 kg` and specific heat `900 J//kg-K`. Containing `0.5 kg` of a liquid of specific heat `2400 J//kg-K`. Its temperature falls from `60^(@)C` to `55^(@)C` in one minute. Find the rate of cooling.

A

`5 J//s`

B

`15 J//s`

C

`100 J//s`

D

`115 J//s`

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