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To find the speed, we have to use the kinetic energy definition
[tex]K=\frac{1}{2}\cdot m\cdot v^2[/tex]Where K = 890,000 Joules and m = 170,000 kg. Let's replace these values and solve for v
[tex]\begin{gathered} 890,000J=\frac{1}{2}\cdot170,000\operatorname{kg}\cdot v^2 \\ 890,000\cdot2J=170,000\operatorname{kg}\cdot v^2 \\ \frac{1,780,000}{170,000}m^2/s^2=v^2 \\ v^2\approx10.5m^2/s^2 \\ v\approx\sqrt[]{10.5m^2/s^2} \\ v\approx3.2m/s \end{gathered}[/tex]