Solution to Problem 104 Normal Stress

Problem 104
A hollow steel tube with an inside diameter of 100 mm must carry a tensile load of 400 kN. Determine the outside diameter of the tube if the stress is limited to 120 MN/m2.
 

Solution 104

 

Comments

Can someone help me with the calculations in the last part of the soluton how did the answer come about in solution 104

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