the length of a rectangular wall is 10 M. there are two similar square shelves of edges 2 metre fixed on the wall. the area of the wall that was not covered by the shelves is 42 M. calculate the breadth of the wall.
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breadth is 5 m becsuse add the area of the 2 shelves to the final area and then u will get it as 10*x=50 so x=5m
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