Answer:
width = 18 m
Step-by-step explanation:
Area of square and area of rectangle are equal.
side = 12 m
Area = side *side
= 12 * 12
= 144 m²
length = 8 m
Area of rectangle = length * width
= 8 *width
Area of rectangle = area of square
8* width= 144
width = 144 ÷ 8
[tex]\boxed{\bf width = 18 \ m}[/tex]