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An agricultural field is in the form of a rectangle of length `20 m` and width `14 mdot` A pit `6mlong,3mw i d ea n d2. 5 md e e p` is dug in a corner of the field and the earth taken out of the pit is spread uniformly over the remaining area of the field. Find the extent to which the level of the field has been raised.

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A rectangular tank measuring 5m\ x\ 4. 5 m\ x\ 2. 1 m\ is dug in the centre of the field measuring 13. 5 m\ x\ 2. 5 m . The earth dug out is spread evenly over the remaining portion of the field. How much is the level of the field raised?

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