A cyclone has been designed with an inlet width of 10cm and an inlet height of 6cm. The height of the main upper cylinder is 16cm and the height of the lower cone is 16cm. The inlet gas velocity is 16m/s and the particle density is 1.6 gm/cc. The working temperature of the process is 400K. Estimate the particle size that will be collected with 50 percent collection efficiency.