A well-insulated piston cylinder contains air initially of 0.01 m at 1.5 bar, 30C. The cylinder is connected to an air supply pipe via a valve. Air in the supply pipe is at constant 4 bar pressure and 30 C temperature. Now the valve is opened, air is pumped into the cylinder until the air volume inside the cylinder becomes 0.02 m. In this process, the pressure upon the piston is always 1.5 bar. Find the temperature of air in the cylinder at the final state, in C, that is pumped into the cylinder in this process. Give one digit after the decimal point.