Question
Sun February 05, 2012 By:
 

A well whose diameter is 7 m has been dug 22.5 m deep and the earth dug out is used to form an embankment around it.If the height of the embankment is 1.5 m.Find the width of the embankment.

Expert Reply
Sun February 05, 2012
Volume of well = Volume of embankment
So pie*(3.5)2 *22.5 = pie *(x)2 * 1.5 - pie * (3.5)2 * 1.5
On solving we get x = 14 m
So width of the embankment = 14 - 3.5 = 10.5 m 
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