Question

The pressure at a point 4m below the free surface of the water is

1. 19.24 kPa
2. 29.24 kPa
3. 39.24 kPa
4. 49.24 kPa

Answer 1

Correct Answer - Option 3 : 39.24 kPa

Concept:

The pressure at a certain point which is above or below at height h is given by

P = ρgh

Where, ρ = Density of fluid, g = Gravitational acceleration, h = Height.

Calculation:

Given:

h = 4 m, g = 9.81 m/s²

Here the given fluid is water so ρ = 1000 kg/m3 

P = ρgh = 1000 × 9.81 × 4 = 39240 Pa = 39.24 kPa

The pressure at a point 4 m below the free surface of the water is 39.24 kPa.