Pressure exerted by each mass on the surface is given by
[tex] P = \frac{F}{A}[/tex]
here F = force due to weight of object
A = area of the base
now for object 1 we will have
[tex]P_1 = \frac{2* 9.81}{0.1}[/tex]
[tex]P_1 = 196 Pa[/tex]
Similarly for object 2
[tex]P_2 = \frac{8*9.8}{0.4}[/tex]
[tex]P_2 = 196 Pa[/tex]
So by the above calculations we can say that pressure at the bottom surface will be same due to both blocks.