Solution,
Pressure, P1 = (25 x 9.8)/(pi/4) x 0.1^2 = 31.24 kN/m^2
Pressure, P2 = F/A = m2 g/ (pi/4) d^2
Diameter, d = sqrt(4 m2 g/P2 pi)
d = sqrt[(4 x 1900 x 9.8)/(31242 pi)] = 0.87 m
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