Answer:
5 m/s
Step-by-step explanation:
The equation for speed is distance/time. The distance, 15, will go over the time, 3. So, we have 15/3.
You can simplify this by dividing both sides by 3. 15/3 is 5. 3/3 is 1. Now we have 5/1, with 5 as meters, 1 and second.
Therefore, the correct answer is 5 m/s.
Hope I helped!!!!!!!