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A Carnot's engine is made to work betwee...

A Carnot's engine is made to work between `200^(@)C` and `0^(@)C` first and then between `0^(@)C` and `-200^(@)C`. The ratio of efficiencies of the engine in the two cases is

A

`1.73:1`

B

`1:1.73`

C

`1:1`

D

`1:2`

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The correct Answer is:
A
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