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A carnot engine, whose efficiency is 40%...

A carnot engine, whose efficiency is `40%`, takes in heat from a source maintained at a temperature of 500 K. It is desired to have an engine of efficiency `60%`. Then , the intake temperature must be

A

efficiency of Carnot engine cannot be made larger than `50%`

B

1200 K

C

750 K

D

600 K

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The correct Answer is:
C
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