Answer
$83.8$ feet
Work Step by Step
We can determine the required distance as follows:
$s=l\cdot\theta$
We plug in the known values to obtain:
$s=4\cdot 20\cdot (\frac{\pi}{180})$
This simplifies to:
$s=\frac{4\pi}{9}$
Now, we can calculate the distance travelled in one minute as
$s=\frac{4\pi}{9}\times 60$
This simplifies to:
$s=83.8$ feet
