Answer
$$t\approx3.1\space \text{cm}$$
Work Step by Step
For a circle of radius $r$, the arc length $s$ corresponding to a central angle $\theta$ (in radians) is given by $s=r\theta$.
Therefore,
$$t=(3cm)\bigg(\frac{\pi}{3}\bigg) = \pi\space \text{cm} \approx 3.1\space cm$$
