Question

Find the approximate perimeter of the track:

Answer 1

Answer:

366 feet

Explanation:

The two semicircles have a diameter of 40 feet.

$\begin{gathered} \text{Radius}=\frac{40}{2} \\ =20\text{ feet} \end{gathered}$

First, find the perimeter of the two semicircles:

$\begin{gathered} P=2(\frac{2\pi r}{2})=2\pi r \\ =2\times\frac{22}{7}\times20 \\ =125.71\; ft \end{gathered}$

Therefore, the approximate perimeter of the track is:

$\begin{gathered} P=125.71+120+120 \\ =365.71 \\ \approx366\; ft \end{gathered}$

The approximate perimeter of the track is 366 feet.