Question 1099693
3 balls would make the can 3 diameters high.
{{{H=3D}}}
{{{C=pi*D}}}
So,
{{{C-H=pi*D-3D}}}
{{{C-H=(pi-3)D}}}
{{{C-H=(pi-3)2.5}}}{{{in}}}
Work that out for the answer.