A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be_________________?

A. 30 MN/m2
B. 50 MN/m2
C. 100 MN/m2
D. 200 MN/m2
E. 300 MN/m2

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