Answer
The equation of continuity leads to
$$
v_{2} A_{2}=v_{1} A_{1} \Rightarrow v_{2}=v_{1}\left(\frac{r_{1}^{2}}{r_{2}^{2}}\right)
$$
which gives $v_{2}=3.9 \mathrm{m} / \mathrm{s}$
Work Step by Step
The equation of continuity leads to
$$
v_{2} A_{2}=v_{1} A_{1} \Rightarrow v_{2}=v_{1}\left(\frac{r_{1}^{2}}{r_{2}^{2}}\right)
$$
which gives $v_{2}=3.9 \mathrm{m} / \mathrm{s}$
