Given:
Area of a rectangle = 4 square meters
wight = 1/5 meter
find the length
Area of a rectangle = length * width
length = area / width
length = 4 m² ÷ 1/5 m
length = 4 m² * 5/1m
length = 20 m
length is 20 meters.
Area = 20 m * 1/5 m = 20 m² / 5 = 4m²