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A hot body placed in air is cooled down ...

A hot body placed in air is cooled down according to Newton's law of cooling, the rate of decrease of temperature being `k` times the temperature difference from the surrounding. Starting from `t=0` , find the time in which the body will loss half the maximum heat it can lose.

A

`ln2//k`

B

`k//l n2`

C

`kln2`

D

None of these

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The correct Answer is:
A
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