A pan filled with hot food cools from 50...

A pan filled with hot food cools from 50 °C to 49.9 °C in 5 s. If it cools from 40 °C to 3 9.9 °C in 10 s, then room temperature is

`30^(@)C`

`35^(@)C`

`25^(@)C`

`37^(@)C`

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