The shape of the well is considered to be cylindrical as shown in the figure.Given:Depth (h) of well =20 mRadius (r) of circular end of well = 27​mArea of platform = Length x Breadth =22×14m 2Assume height of the platform =HThe volume of soil dug from the well will be equal to the volume of soil scattered on the platform.Volume of soil from well = Volume of soil used to make such platform⟹πr2h = Area of platform x Height of platformπ×(27​)2×20=22×14×HH=722​×449​×22×1420​H=25​=2.5 mHence, the height of such a platform will be 2.5 m .