Solve the problem.The cylindrical storage vat in the picture has a base with radius of r and a height of r. The volume of the vat is the product of its height and the area of the base. Find the volume of the cylinder. 

A. ?r3 ft3 
B. 2?r3 ft3
C. ?r3 ft3 
D. ?r3 ft3 

Answer: D

Mathematics

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