# A well is dug 20

Given: Height = 20 m

Diameter = 7 m

Length of plot = 22 m

Breadth of plot = 14 m

To find: The height of platform

Formula Used:

Area of rectangle = Length × Breadth

Volume of cylinder = πr2h

Given,

Depth of well = 20m

Diameter of well = 7 m

Dimension of rectangular field = 22m × 14m

so,

Amount of earth dug out from well = πr2

=770 m3

when this earth is spread on rectangular field:

Volume of the well = Volume of rectangular field

Volume of the well = Area of rectangular field × Height of rectangular field

Then height of platform formed on rectangular field =

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