Question
A well with 20 m inside diameter is dug 10 m deep. Soil
taken out of it has been evenly spread all around it to a width of 30 m to form an embankment. Find the height of the embankment.Solution
Volume of the soil dug out = πr2h ⟹( (22)/(7) x 10 x 10 x 10) = 3,142.85m³. Area of embankment = Area of embankment with well - Area of well = ( x 40 x 40) - ( x 10 x 10 ) = 4,714 m² Height of embankment = (Volume)/(Area) = (3142.85)/(4714.3) = (2)/(3)m.
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