A Thin-Walled Cylindrical Tank with a Diameter of 2 $h$ Of Water (Weight Density

Multiple Choice

A thin-walled cylindrical tank with a diameter of 2.0 m and wall thickness of 18 mm is open at the top. The height $h$ of water (weight density $= 9.81 \mathrm { kN } / \mathrm { m } ^ { 3 }$ ) in the tank at which the circumferential stress reaches $10 \mathrm { MPa }$ in the tank wall is approximately:

A) $14 \mathrm {~m}$
B) $18 \mathrm {~m}$
C) $20 \mathrm {~m}$
D) $24 \mathrm {~m}$