Answer
$$2.273 \mathrm{min}$$
Work Step by Step
Since the electron moves with an average speed, the time is:
$$
\frac{x}{v_{a x y}}=t
$$
Plugging in known values:
$$
\begin{aligned}
\frac{x}{v_{\text {avg.}}}=t & \\
&=\frac{(1.5 \mathrm{m})}{\left(1.1 \times 10^{-2} \mathrm{m} \cdot \mathrm{s}^{-1}\right)} \\
&=136.36 \mathrm{s}
\end{aligned}
$$
Converting to minutes:
$$
2.273 \mathrm{min}=136.36 \mathrm{s} \times \frac{(\mathrm{min})}{(60 \mathrm{s})}=t
$$
$$
\begin{array}{l}
2.273 \mathrm{min}=t \\
\end{array}
$$
