Approximately how many cubic feet of water are needed to fill a circular swimming pool that is 60 feet across and 6 feet deep?  Select the correct option:
A) 900
B) 4000
C) 10000
D) 17000
E) 25000

Rationale: "answer should be d . v = \ pir ^ 2 h = \ pi * 30 ^ 2 * 6 = approximately 17000"
Answer: D