Problem Find the volume of the cylinder.

Either enter an exact answer in terms of \piπpi or use 3.143.143, point, 14 for \piπpi

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?