When standing upright, Gary knows his eyes are 6 feet above ground level. To determine the depth of a well, he stands in the position shown. Which expression may be used ti determine the volume of the well?
(He is standing 2 feet away from the well and he is looking down at the well creating a right triangle and the well is 6 feet wide)
A. π(6)^2(18)
B. π(3)^2(9)
C. π(3)^2(12)
D. π(3)^2(18)