To find out how long it took Dita to run 100 meters at a speed of 6.25 meters per second, you can use the formula:
\[ \text{time} = \frac{\text{distance}}{\text{speed}} \]
Substituting in the values:
\[ \text{time} = \frac{100 \text{ meters}}{6.25 \text{ meters/second}} = 16 \text{ seconds} \]
So, it took Dita 16 seconds to finish the race.