Question 705019

The average radius is $r_{avg} = (4 + 10) / 2 = 7 \text{ cm} = 0.07 \text{ m}$. The circumference is $2 \pi r_{avg} = 2 \times 3.14 \times 0.07 = 0.4396 \text{ m}$. For $100$ turns, distance $= 100 \times 0.4396 = 43.96 \text{ m} \approx 44 \text{ m}$.