Answer:
4π m
Step-by-step explanation:
we have:
the circumference of a circle = 2πr
r = radius
we have from the picture:
radius of the outer circle= 9 m
the circumference of the outer circle = 2π(9) = 18π m
radius of the inner circle= 9 m - 2m = 7m
the circumference of the inner circle = 2π(7) = 14π m
hence, the difference between the circumference of the outer circle and the circumference of the inner circle = 18π m - 14π m = 4π m
