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In the previous question will be its temperature 5 min after reaching `40^(@)C`?

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In the previous question will be its temperature 5 min after reaching `40^(@)C`?
A. `35^(@)C`
B. `(100)/(3)^(@)C`
C. `32^(@)C`
D. `30^(@)C`
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1 Answer

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Correct Answer - B
(2) `(40 - theta)/(5) = - k ((40 + theta)/(2) - 20)`
`(40 - theta)/(5) = (2)/(25) ((theta)/(2))`
`200 - 5 theta = theta implies theta = (100)/(3).^(@)C`
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