Answer:
28.26
Explanation:
I CAN say what the answer is
Over here, the radius is 4.5m. Since the diameter is 2 times the radius, we just do 4.5*2=9, so 9 is the diameter. Then we do 9*pi which is 9pi and plugging in the given value for pi, we get 28.26.
9/10 times, your first answer is correct but it's always good to check your answer.