A cylindrical shell, 3m long, is closed at the ends. It has an internal diameter of 1m and a wall thickness of 15mm. Calculate the circumferential and longitudinal stresses induced. Which of the following options correctly describes the calculation?
A) Calculate the sum of the circumferential and longitudinal stresses.
B) Calculate the difference between the circumferential and longitudinal stresses.
C) Calculate the product of the circumferential and longitudinal stresses.
D) Calculate the ratio between the circumferential and longitudinal stresses.