Question

petrol density 0.80 g/cm2 is poured in a vessel upto a level of 75 cm.calculate the pressure at the bottom of the vessel

Answer 1

since the pressure of a liquid is given by
¶gh ,
where¶ os the density of liquid and h = height
g = 10
then p =
$0.80 \times 75 \times 10 \\ 8 \times 75 \\ 600$

Answer 2

The pressure at the bottom of the vessel is 105880 Pa.

Explanation:

Given that,

Density of the petrol, $d=0.8\ g/cm^3=800\ kg/m^3$

Height, h = 75 cm = 0.75 m

We need to find the pressure at the bottom of the vessel. It is given by :

$P=dgh$

$P=800\ kg/m^3\times 9.8\ m/s^2\times 0.75\ m$

P = 5880 Pa

The pressure at the bottom of the vessel is equal to the sum of atmospheric pressure and the pressure due to some height as :

$P=P_a+P$

$P_a=10^5\ Pa$

$P=10^5+5880$

P = 105880 Pa

So, the pressure at the bottom of the vessel is 105880 Pa. Hence, this is the required solution.

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