Q. 304.6( 17 Votes )

A well of diamete

Answer :

Given, Diameter of well = 4m

So, radius of well(r) = 4/2 = 2m


Height of well(h) = 14m



Let the width of the embankment = x m


Total width of well including embankment(R) = (2 + x)m


Height of the embankment(H) = 40cm = 0.4m


Volume of the earth out =



140 = (2 + x)2-4


(x + 2)2-144 = 0


(x + 2)2-122 = 0
(x + 2 + 12)(x + 2-12) = 0


(x + 14)(x-10) = 0


x = -14(Rejected) or x = 10


The width of the embankment = 10m


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