A vessel of 4m^³ contains oil which weighs 30 kN. The specific weight of the oil is

Concept:

Specific gravity or Relative density:

The ratio of density or specific weight of a subject matter to that of a standard matter is known as specific gravity relative density.

Specific weight or weight density:

Specific weight or weight density of a fluid is the ratio between the weight of a fluid to its volume.

where weight = mass × gravitational acceleration = m × g

Calculation:

Given,

W = 30 kN, V = 4 m3

We know that

The specific weight of the oil is 7.5 kN/m3