What is the ratio of the strain energy in bar X to that in bar Y when the material of the two bars is the same? The cross-sectional areas are as indicated over the indicated length.

What is the ratio of the strain energy in bar X to that in bar Y when

1.	What is the ratio of the strain energy in bar X to that in bar Y when the material of the two bars is the same? The cross-sectional areas are as indicated over the indicated length.
A.	1/3
B.	2/3
C.	4/3
D.	1/6
Answer» C. 4/3