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If a metallic sphere gets cooled from 62...

If a metallic sphere gets cooled from `62^(@)C` to `50^(@)C` in minutes 10 and in the next 10 minutes gets cooled to `42^(@)C` , then the temperature of the surroundings is

A

`30”^(@)C`

B

`36”^(@)C`

C

`26”^(@)C`

D

`20”^(@)C`

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