GRE Problem Solving Question 257
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Source: 150math
The volume V of a right circular cylinder is , where r is the radius of the base and h is the height of the cylinder. If the volume of a right circular cylinder is 45*π and its height is 5, what is the circumference of its base?
- A 3
- B 9
- C 3*π
- D 6*π
- E 9*π