We have to find the displacement for each time. It's important to know that the velocity will be the same, always, because it's a constant motion. Also, the acceleration is null.
Let's find the displacement using the constant motion equation.
[tex]d=vt[/tex]
Where v = 30 m/s, and t = 1,2,3,4,5,6,7,8,9,10.
[tex]\begin{gathered} d=30\cdot\frac{m}{s}\cdot1s=30m \\ d=30\cdot\frac{m}{s}\cdot2s=60m \\ d=30\cdot\frac{m}{s}\cdot3s=90m \\ d=30\cdot\frac{m}{s}\cdot4s=120m \\ d=30\cdot\frac{m}{s}\cdot5s=150m \\ d=30\cdot\frac{m}{s}\cdot6s=180m \\ d=30\cdot\frac{m}{s}\cdot7s=210m \\ d=30\cdot\frac{m}{s}\cdot8s=240m \\ d=30\cdot\frac{m}{s}\cdot9s=270m \\ d=30\cdot\frac{m}{s}\cdot10s=300m \end{gathered}[/tex]
Once we have all the displacement, we can complete the table.
