First slide

Fluid statics

Question

A tank 5 m high is half filled with water and then is filled to the top with oil of density 0.85 $g / {cm}^{3}$ . The pressure at the bottom of the tank, due to these liquids is

Moderate

A

1.85 $g / {cm}^{2}$
B

89.85 $g / {cm}^{2}$
C

462.5 $g / {cm}^{2}$
D

500 $g / {cm}^{2}$

Solution

Pressure at the bottom
$P = (h_{1} d_{1} + h_{2} d_{2}) \frac{g}{{cm}^{2}}$
= [250 $\times 1 + 250 \times 0.85]$
= 250[1.85] $\frac{g}{{cm}^{2}} = 462.5 \frac{g}{{cm}^{2}}$

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