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Certain quantity of water cools from 70^...

Certain quantity of water cools from `70^(@)C` to `60^(@)C` in the first `5` minutes and to `54^(@)C` in the next `5` minutes. The temperature of the surrounding is

A

`45^(@)C`

B

`20^(@)C`

C

`42^(@)C`

D

`10^(@)C`

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The correct Answer is:
A
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