The shape of the well will be cylindrical.

Depth (h_{1}) of well = 14 m

Radius (r_{1}) of the circular end of well = 3/2 m

Width of embankment = 4 m

From the figure, it can be observed that our embankment will be in a cylindrical shape having outer radius (r_{2}) as 4+3/2=11/2 m and inner radius (r_{1}) as 3/2 m.

Let the height of embankment be h_{2}.

Volume of soil dug from well = Volume of earth used to form embankment

Therefore, the height of the embankment will be 1.125 m.