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Two identical metal balls at temperature...

Two identical metal balls at temperature `200^(@)C` and `400^(@)C` kept in air at `27^(@)C`. The ratio of net heat loss by these bodies is

A

1 : 2'

B

1 : 4'

C

`((473)^4 - (300)^4)/((673)^4 - (300)^4)`

D

`((200)^4 - (27)^4)/((400)^4 - (27)^4)`

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