Answer:
Step-by-step explanation:
Let w be the width
Length = w + 3
Perimeter = 40 m
2*(length + width) = 40
2*(w+3 + w) = 40
2* (2w + 3) =40
2w + 3 = 40/2
2w + 3 = 20
2w = 20-3
2w = 17
w = 17/2 = 8.5 m
w = 8.5 m
Length = w + 3 = 8.5 + 3 = 11.5m
