Answer:
3.4 inches
Explanation:
Determine the diameter required to protect the vessel from a regulator failure ( relief diameter )
A = [tex]\frac{\pi d^2}{4}[/tex]
Hence d = [tex]\sqrt{\frac{4A}{\pi } }[/tex] = [tex]\sqrt{\frac{4 * 9.08}{\pi } }[/tex] = 3.4 inches
attached below is the remaining part of the solution