of the 108 students in the school chorus, 48 are sopranos, 24 are altos, and 36 are tenors. What is the greatest number of groups that can be formed with the same number of each type of voice in each group

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