Answer
$7.88\frac{m}{s}$
Work Step by Step
We know that
$A_1v_1=A_2v_2$
$\implies w_1d_1v_1=w_2d_2v_2$
This can be rearranged as:
$v_2=\frac{w_1d_1v_1}{w_2d_2}$
We plug in the known values to obtain:
$v_2=\frac{(12)(2.7)(1.2)}{(5.8)(0.85)}=7.88\frac{m}{s}$
