Correct Answer - Option 3 : 150 kPa
- The normal force exerted by liquid at rest on a given surface in contact is called the thrust of liquid on that surface.
- The normal force (or thrust) exerted by liquid at rest per unit area of the surface in contact with it, is called pressure of liquid or hydrostatic pressure.
- If P is the pressure for a point at depth h below the surface of a liquid of density ρ.
Hydrostatic pressure P is given by P = ρgh
Height (h) = 15 m and density of water (ρ) = 103 kg/m3
The pressure at a depth of 15 m is:
⇒ Pa = ρgh
⇒ Pa = 103 × 10 × 15 = 150 kPa
Hence the required pressure at the given depth is 150 kPa.