$$Pressure = Force / Area$$

Substituting the given values:

$$Pressure = 30N / 120cm^2$$

To convert cm^2 to m^2, we need to divide by 10000:

$$Pressure = 30N / 0.012m^2$$

Calculating the pressure:

$$Pressure = 2500Pa$$

Therefore, the pressure when a 30N force is applied on an area of 120cm square is 2500 pascals (Pa).