A Copper Tube with Wall Thickness of 8 Mm Must $\text { MPa. }$

Multiple Choice

A copper tube with wall thickness of 8 mm must carry an axial tensile force of 175 kN. The allowable tensile stress is 90 MPa. The minimum required outer diameter is approximately: $\text { MPa. }$

A) 60 mm
B) 72 mm
C) 85 mm
D) 93 mm