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Perimeter is 36 mArea is 72 square m
The surface area depends on the shape, not just the length of sides.
-15m but -15 metres doesnt exist
The formula for finding a rectangle's perimeter is 2(l+w).Here, length is given as 12 m & width as 6m. So, the correct answer is2(l+w)=2(12+6)=2 x 18=36m.