A thin walled cylindrical vessel of wall thickness 't' and diameter 'd' is filled with gas to a gauge pressure of p, the maximum shear stress on the pressure wall will be
1
\(\frac{pd}{4t}+\frac{p}{2}\)
2
\(\frac{pd}{8t}\ +\ p/2\)
3
\(\frac{pd}{8t}\)
4
\(\frac{pd}{4t}\)