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5. A field is 120 m long and 70 m broad. In one corner of the field a pit, which is 20mremaining part of the field. Find the rise in the level of the fieldt. The earth taken out of it is evenly20 m broad and 8 m deep, has been dug outover the6. Awall of 12 m long, 35 cm wide and 5 m high is made of hrich

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