To calculate the thickness of foil, we use formula of volume as
[tex]V= l w t[/tex]
Here, l is the length of the foil, w is the width of the foil and t is the thickness of the foil.
Given, [tex]V = 0.750 \ cm^3[/tex], [tex]l = 50 cm[/tex] and [tex]w = 10 \ cm[/tex].
Substituting theses values in above equation, we get
[tex]0.750 \ cm^3 = 50 cm \times 10 \ cm \times t \\\\ t = 0.0015 cm[/tex]
Thus, the thickness of the foil is 0.0015 cm.