Answer
35 yd.
Work Step by Step
The length of the two semicircular parts form a circle and the circumference of this circle is equal to $440 - 110 - 110 = 220 yd.$
The circumference of a circle is equal to $2\pi r$. Using this formula, substitute 220 yd in and find r.
$2\pi r = 220$
$r = 220 \div (2\pi)$
$r \approx 35$.
Therefore, the radius of the semicircular parts is 35 yd.
