Gravel is being dumped from a conveyor belt at a rate of 30ft^3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always
Gravel is being dumped from a conveyor belt at a rate of 30ft^3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always