Answer
62.9 mph.
The driver deserves a ticket.
Work Step by Step
For r=16 in. , and, using part (a), $\theta\approx 248,914.29$ radians
find the total arc length, s.
$ s=r\theta$
$ s\approx (16$ in $) (248,914.29)=3,982,628.64$ in
We convert to miles,
$(3, 982, 628.64$ in. $) (\displaystyle \frac{1\ ft}{12\ in} )(\displaystyle \frac{1\ mi}{5280\ ft} )\approx 62.9$ mi
(in one hour)
The speed of the truck is 62.9 mph.
The driver deserves a ticket.
