mechanics problem Dahl and Crandall

Hi All,

I am doing a problem on mechanics and find that the answers are not matching (mine are coming .0085 and .002 inch).I am attaching the question and the answer herewith.

I presume that bending effect is not to be taken into consideration as otherwise the dimensions of the beam would have been furnished.I tried both direct stiffness and virtual work methods and didn't get the required answer.

Can anybody validate the same.I restrain myself using FEA analysis fo it as it would have taken thet bending effect also.

Thanks and Best Regards

Kapil