Answer :
40 meters /16 seconds = 2.5 meters per second
16 seconds /40 meters = 0.4 second per meter
16 seconds /40 meters = 0.4 second per meter
[tex]It's\ speed:v=\frac{s}{t}\\\\s-distance\\t-times\\\\\frac{40m}{16s}=\frac{5}{2}\ m/s=2.5\ m/s[/tex]
