Jack wants to cover the top of his chocolate pie with crushed cookie crumbs. Jack’s pie has a diameter of 8” with a ½” crust. How much area will Jack need to cover with crumbs?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min