Question

A pan filled with hot food cools from 94°C to 86°C in 2
minutes. The room temperature is 20°C. How long will it take
to cool from 74°C to 66°C?

Answer 1

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★ formula to be used =

(∅1-∅2)/t = k (∅1+∅2)/2-∅°

where ∅1 and ∅2 are initial and final temperature

∅° = temperature of surrounding.

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happy to help (: