A metallic sphere cools from 50^(@)C to ...

A metallic sphere cools from `50^(@)C` to `40^(@)C` in `300` seconds. If the room temperature is `20^(@)C` then its temperature in next `5` minutes will be -

A

`38^@C`

B

`33.3^@C`

C

`30^@C`

D

`36^@C`

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The correct Answer is:

B

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