Question

A solid weighs 300 N calculate the pressure exerted by solid on a surface,if the area of contact is 200 cm 2

Answer 1

Here, weight of the solid is the force exerted by it on the surface. Area=200/10000=0.02m2
Pressure = Force/Area Pressure = 300/0.02=1500N/m2 or 1500 Pascal

Answer 2

Your answer is wrong

In this,

First convert area in m^2 as it's N/m^2

400×(m/100)^2=400×1/100×1/100

=1/25 m^2

Now,

Pressure =Force/Area

=300/1/25=300×25

=7500Pa or 7500N/m^2