A field is in the form of a rectangle of length 20 m and width 14 m. A 10 m deep well of diameter 7 m is dug in a corner of the field and earth taken out of the well is spread evenly over the remaining part of the field. Find the rise in its level.
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Answer is (770÷483)m
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r=7/2
vol of earth dug out=pi r^2h
1.6m (aprrox)
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