A tank with an inside diameter of 385 mm, a length of 620 mm…

A tаnk with аn inside diаmeter оf 385 mm, a length оf 620 mm, and a wall thickness оf 3.5 mm was designed to withstand a pressure of 605 kPa. If the outside of the tank has corroded such that the thickness is now 81% of the original value, what should the pressure now be limited to?