Hello!!
For calculate the velocity let's applicate the formula:
[tex]\boxed{d=v*t}[/tex]
[tex]\textbf{Being:}[/tex]
[tex]\sqrt{}[/tex] d = Distance = 4000 m
[tex]\sqrt{}[/tex] v = Velocity = ?
[tex]\sqrt{}[/tex] t = Time = 400 s
⇒ [tex]\text{Then let's \textbf{replace it according} we information:}[/tex]
[tex]4000 \ m = v * 400 \ s[/tex]
⇒ [tex]\text{Let's resolve it: }[/tex]
[tex]v = 4000 \ m / 400 \ s[/tex]
[tex]v = 10 \ m / s[/tex]
[tex]\textbf{Result:}\\\text{The velocity is \textbf{10 m/s}}[/tex]
