A Water Tank Is in the Shape of a Sphere $6 \mathrm { ft }$

Multiple Choice

A water tank is in the shape of a sphere of radius 10 feet. The tank is supported on a metal circle 8 feet below the center of the sphere, as shown in the figure. Find the radius of the metal circle

A) $6 \mathrm { ft }$
B) $2 \mathrm { ft }$
C) $3 \mathrm { ft }$
D) $5 \mathrm { ft }$
E) none of these