A 20 m deep well with diameter 7 m is dug up and the earth from digging is spread evenly to form a platform 22 m * 14 m. Determine the height of the platform.
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Given, height of the well=20m
Diameter =7m=7/2m
Volume of the well= pir2h
=22/7×7/2×7/2×20
=22×7×5m
=770m3
Now, Lenght of the plot =22m
Breadth of the plot =14 m
Area =l×b
=14×22
=308m2
Therefore, Height of the platform formed =Volume of well/area of plot
=770/308=2.5m
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