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A black body calorimeter filled with hot...

A black body calorimeter filled with hot water cools from `60^(@)C` to `50^(@)C` in `4 min` and `40^(@)C` to `30^(@)C` in `8min`. The approximate temperature of surrounding is :

A

`10^(@)`

B

`15^(@)C`

C

`20^(@)C`

D

`25^(@)C`

Text Solution

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The correct Answer is:
B
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