Social & Preventive Medicine General 1ddf3f7e What is the size of paicle is rapid sand filter ? A 0.1 mm B 0.2 C 0.5 D 4 to 0.7 mm High-Yield Explanation Ans. is 'd' i.e., 0.4 to 0.7 mm Rapid sand filter 0.4 - 0.7 rnm Slow sand filter 0.2 - 0.3