Chapter 10.9, Problem 13PSB

To determine

To find : How far sandy travel going once around in the outside lane and in the inside lane.

Answer to Problem 13PSB

  $96.5$ m, $71.4$ m

Explanation of Solution

Given information :

  

Outside lane radius ( $r_1$ ) = $9$ m

Inside lane radius ( $r_2$ ) = $5$ m

Formula Used:

Circumference of circle = $2\pi r$

Calculation :

Outside lane = $40+2\pi (9)m$

  $\begin{array}{l}=40+18\pi m\\ =96.5m\end{array}$

Inside lane = $40+2\pi (5)$

  $\begin{array}{l}=40+10\pi \\ =71.4m\end{array}$