Answer:
Width = 9 m
Length = 12 m
Area = 108 m²
Explanation:
Let, width = x
Length = x + 3
Perimeter = 42 m
Perimeter = 2 (l + w)
42 = 2 (x + 3 + x)
42/2 = 2x + 3
21 - 3 = 2x
18 = 2x
18/2 = x
9 m = x (width)
Length = x + 3 = 9 + 3 = 12 m
Area
= l × w
= 12 × 9
= 108 m²
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Hope it helps ⚜