Object I is a solid cylinder with diameter d has resistance R. What would be resistance of
another object made of the same material and with the same mass as Object I but has the cross
section shown below (it is a hollow cylinder with outer diameter 2d and inner diameter d).
R/9
9R
R
R/3
3R

Question

Object I is a solid cylinder with diameter d has resistance R. What would be resistance of 
another object made of the same material and with the same mass as Object I but has the cross 
section shown below (it is a hollow cylinder with outer diameter 2d and inner diameter d).
R/9
9R
R
R/3
3R

experimentx · Answer

the resistivity of the material does not change.

experimentx · Answer

calculate the resistivity of both objects, also note that the volume of both objects are same.