An ideal gas is taken through a cyclic process $1\to 2\to 3\to 1.$ At 1 temperature is ${\text{127}}^{\text{0}}\text{C}$ and volume is ${\text{20cm}}^3$, while at 3 temperature is ${\text{27}}^{\text{0}}\text{C}$ and volume is ${\text{50\hspace{0.17em}cm}}^3$. The gas attains a state S in the process $3\to 1$ where the pressure is same as at 2, then