A carnot engine absorbs `1000J` of heat energy from a reservoir at `127^(@)C` and rejecs `600J` of heat energy during each cycle. Calculate (i) efficiency of the engine, (ii) temperature of sink, (iii) amount of useful work done per cycle.

Options

A. `70% and -10^@C`
B. `50% and -20^@C`
C. `40% and -33^@C`
D. `20% and -43^@C`

Answer

C