Question

Three cylindrical blocks x, y and z are made of different materials of densities 2g/cm3, 5g/cm3 and 10g/cm3 respectively. If the side of each block resting on a level surface has an area of 2cm2, 4cm2 and 6cm2 and the height of block x is 10cm calculate;
1) weight of block x
2) pressure exerted by block x on the surface
3) height of blocks y and z if the pressure exerted by each block on the surface is the same

Answer 1

1) weight= mass x gravity
mass= density x volume
volume= area x height
volume= 10 x 2= 20
mass= 20 x 2= 40g
40g=0.04kg
weight= 0.04 x 10= 0.4N

2) P= 0.4/2 x 0.01
P= 2000Pa

3) I need help with this last part myself. If someone would be so kind as to help.