Q17 of 47 Page 1

Awell of diameter 4 m is dug 21 m deep. The earth taken out of its has been spread evenly all around it in the shape of a circular ring of width 3 m to form an embankment. Find the height of the embankment.

On the basis of condition given in the equation the diagram can be drawn as follows:


It is given in the question that,


Radius of well,


Radius of embankment,


Also, height of the well, h = 21 m


∴ required height raised = .


.



.


4 m


∴ The height of the embankment is 4 m


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