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Q9) A cylindrical gas bottle is pressurized to 80 bars. The internal diameter of the bottle is 125 mm with wall thickness of 5 mm.

Calculate EACH of the following:

(a) Tensile stress on an oblique plane at 30° to the longitudinal axis of the bottle; (6)

(b)Shear stress on the same oblique plane; (4)

(c) Magnitude and direction of the resultant stress on the same oblique plane. (6)