A right circular conical vessel is being filled with green industrial waste at a rate of 55 cubic meters per second. How fast is the level rising after 200π cubic meters have been poured in? The cone has a height of 60 m and a radius 20 m at its brim. (The volume of a cone of height h and cross-sectional radius r at its brim is given by V = 1/3 πr^2 h. Round your answer to two decimal places.)
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