A 16 m deep well with diameter 3.5 m is dug up and the earth from it is spread evenly to form a platform 27.5 m by 7 m. Find the height of the platform.
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Answer:
Height of well = 16m
Diameter of well = 3.5m
Volume of well = 22/7×3.5×3.5×16
= 56×11 = 616 m^3
Area of platform = l×b
= 27.5×7 = 192.5 m^3
Height of platform = 616/192.5
= 3.2m
Hence, the height of platform is 3.2m
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