The strain gage shown is used to determine the gage pressure in the cylindrical steel tank. The tank has an outside diameter of 1,250 mm, a wall thickness of 15 mm, and is made of steel (E = 200 GPa; ν = 0.32).

The gage is inclined at a 30° angle with respect to the longitudinal axis of the tank. Determine the pressure in the tank corresponding to a strain gage reading of 290 με.