A pressurized cylindrical tank with flat ends is loaded by torques T and tensile forces P (see figure). The tank has radius r = 50 mm and wall thickness t = 3 mm. The internal pressure p = 3.5 MPa and the torque T = 450 N m.
What is the maximum permissible value of the forces P if the allowable tensile stress in the wall of the cylinder is 72 MPa?

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