The efficiency of a thermodynamic cycle $1-2-3- 1$ (see picture) is $20\%$ and for another thermodynamic cycle $1 - 3-4 - 1$ efficiency is equal to $10\%$. Determine the efficiency $\eta $ (in $\%$) of the thermodynamic cycle $1-2-3-4- 1.$The gas is assumed to be ideal
Diffcult
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