User talk:89.168.45.137

On the page https://en.wikipedia.org/wiki/Torsion_constant in the section "Examples for specific uniform cross-sectional shapes" in the subsection "Rectangle", there seems to be an error.

First formula says J = beta * a * b^3 Second formula says J = ((16/3) - 3.36 * (b/a) * (1- (b^4)/(12*a^4) ) * a * b^3.

These two appear inconsistent. The outcome of the second formula seems to be 16 times larger than the outcome of the first formula, for all values of b/a. Is a multiplication-factor (1/16) missing on the right side of the second formula??

Regards Thomas