Hey I've been trying this problem forever and it's not working if I could have some help that would be Awsome

' ,,,_.__.._.. l Gravel is being dumped from a conveyor belt at a rate of 30 R3/min, and its coarseness is such that it forms% pii in the shape ofa cone whose base diameter and height are always equal. How fast (in ft/min) is the height of the pile increasing when the pile is 13 ft high? (Round your answer to two decimal places.) ft/min Submit