The speed is defined as:
[tex]v=\frac{d}{t}[/tex]where d is the distance and t is the time. In this case the distance is 120 meters and the time is 10 seconds. Then we have:
[tex]v=\frac{120\text{ m}}{10\text{ s}}=12\text{ m/s}[/tex]Therefore the answer is C
