Asolid object has a mass of 104 kg and a volume of 1,278 m3. what is its density? 0.081 kg/m3 12.29 g/cm3 132912.00 g/cm3 cannot be determined

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