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A body at `50^(@)C` cools in a surroundings maintained at `30^(@)C` The temperature at which the rate of cooling is half that of the beginning is .

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A body at `50^(@)C` cools in a surroundings maintained at `30^(@)C` The temperature at which the rate of cooling is half that of the beginning is .
A. `16.32^(@)C`
B. `26.3^(@)C`
C. `40^(@)C`
D. `46.3^(@)C`
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Correct Answer - C
`(d theta)/(dt)=-K(theta-theta_(0))rArrRproptheta-theta_(0)`
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