To find the circumference \( C \) of a circle using the formula \( C = \pi d \), we first need to calculate the diameter \( d \) of the circle. The diameter is twice the radius, so:
\[ d = 2 \times \text{radius} = 2 \times 97 , \text{m} = 194 , \text{m} \]
Now, we can use the circumference formula:
\[ C = \pi d \approx 3.14 \times 194 , \text{m} \]
Calculating this gives:
\[ C \approx 3.14 \times 194 \approx 609.46 , \text{m} \]
Rounding to the nearest whole number, the circumference is approximately:
\[ 609 , \text{m} \]
So the correct response is:
609 m