1.

A pan filled with hot food cool from 94∘C to 86∘C in 2 minutes. When the root temperature is at 20∘C, the time taken to cool from 71∘C to 69∘C is?

Answer»
you have to consider a room temperature here ... if it is 25°c then the answer will come from ..(T1- T2)/t= c{(T1+T2)/2-T0}


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