Let the mass of the star be 1.98 × 1030 kilogram and the power be 8.52 × 1027 Watt. The universal gravitational constant is 6.6726 × 10-11 N m2/kg2 and speed of light is 3 × 108 m/s. The density of the black particle is 1.85 g/cm3. If the force due to the radiation pressure exactly cancels the force due to gravity, evaluate what is the radius of this particle?