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If the area is 140 sq units, then this could be formed from a rectangle 1 unit wide by 140 units long - giving a perimeter of 2 x 140 + 2 x 1 = 282 units.
But, the rectangle could be 14 units wide and 10 units long giving a perimeter of 2 x 14 + 2 x 10 = 48 units.
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