Solve the Problem $\bar { x } = 0 , \bar { y } = 0 , \bar { z } = \frac { 1105 } { 381 }$

Multiple Choice

Solve the problem.
-Find the centroid of a hemispherical shell having outer radius 7 and inner radius 6 if the density is constant.

A) $\bar { x } = 0 , \bar { y } = 0 , \bar { z } = \frac { 1105 } { 381 }$
B) $\bar { x } = 0 , \bar { y } = 0 , \bar { z } = \frac { 3315 } { 1016 }$
C) $\bar { x } = 0 , \bar { y } = 0 , \bar { z } = \frac { 1105 } { 508 }$
D) $\bar { x } = 0 , \bar { y } = 0 , \bar { z } = \frac { 2210 } { 381 }$