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CBSE Class 8 Answered

A well of diameter 3 m is dug 14 m deep. The earth taken out of it has been spread evenly all around it in the shape of a circular ring of width 4 m to form an embankment. Find the height of theembankment.  
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

The shape of well will be cylindrical.

Depth (h1) of well = 14m

Radius (r1) of circular end of well =

Width of embankment = 4m

From the figure embankment will be in a cylindrical shape having outer radius (r2) as and inner radius (r1) as.

Let height of embankment be h2.

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

So, height of embankment will be 1.125 m.

Answered by | 04 Jun, 2014, 03:23: PM

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