The barometric reading at a place is 73.5m Hg. Calculate the pressure at a point 30m below the surface of water contained in a reservoir at the place. [g = ms^-2, density = 1.2 x 10⁴kg m^-3, density of water = 1.0 x 10³m^-3]

A. 4.0 x 10⁵ Nm^-2
B. 3.0 x 10 ⁵ Nm^-2  
C. 2.0 x 10⁵ Nm^-2
D. 1.0 x 10⁵ Nm^-2

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Correct Answer: B