the maximum shear stress induced is

Question

If a thin-walled cylinder with closed hemispherical ends with thickness 12mm and inside diameter of 1250 mm is to withstand a pressure of 1.5MPa, then the maximum shear stress induced is

(a) 19.5 MPa                           (b) 39.05 MPa

(c) 78.12 MPa                         (d) 90.5 MPa