how many cubic metre of soil must be dug out to sink a well which is 21 m deep and has a diameter of 8m ? if the soil sold out is spread over a rectangular plot 24 m×11 m, what is the height off the platform formed
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Answer:
4m
Step-by-step explanation:
Area of rectangular plot = l × b = 24 × 11 = 264m3. The soil level = 1056/264 = 4m
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Step-by-step explanation:
Volume of soil dug out = Volume of well
Volume of well (Cylinder) = pi x r²h
Volume = (22/7) x (4)² x 21 = 1056 m³
Cubic metre of soil must be dug OUT = 1056 m³
Volume of rectangular plot with height h = lxbxh = 1056m³
-> 24 x 11 x h = 1056
-> h = 4m
The height of the platform formed = 4m
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