1.2 mm
a) Calculate the volume of the block
V = 50 g x (1 cm^3/8.64 g) = 5.79 cm^3
b) Calculate the height of the block
The formula for the volume (V) of a block is
V = lwh
where
l = the length of the block
w = the width of the block
h = the height of the block
We can solve this formula for the height.
h = V/(lw)
∴ h = 5.79 cm^3/(10 cm x 5 cm) = 0.12 cm = 1.2 mm