5. Half the perimeter of a rectangular garden, whose length is 4 m more than its width, is 36 m. Find the dimensions of the garden. Rectangular Perimeter = 2(l+b) Half Perimeter = ½ x 2 (l+b) ½ x 2 (l+b) = 36 l+b = 36 --------(1) Length is 4 m more than its width l = b+4 --------(2) substitute l=b+4 in equation (1) l+b=36 b+4+b=36 2b=36-4 2b=32 b=16 b=8 substitute in equation (2) l=b+4 l=16+4=20 l=20, b=16
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