A well of diameter 3m is dug 14m deep. The earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4m to form an embankment. Find the height of the embankment.
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The shape of the well will be cylindrical as shown in the figure below: Given: Depth (h1) of well = 14 m Radius (r1) of the circular end of well = 32m Width of embankment = 4 m From the figure, it can be observed that our embankment will be in a cylindrical shape having outer radius, (r2)=4+32=112 m,
Let height of embankment be h2.
Volume of soil dug from well = Volume of earth used to form the embankment