Assume Stoke's Law holds true for the following question. You are asked to desgin a settling basin. Flow rates are 16 million gallons/day. The basin must be 4m deep, and 4m wide. Particle size ranges from 0.2-50 mm in diameter. A weir will take off the top 0.35m of water at the end, and there must be no particles in this water. Water temperature is 15 C, how long should the basin be? Given Equation: Vt=(g(d^2)(Pp-Pm))/(18u)