Answer:
15km or 15000m
Explanation:
We have a speed, which is 3 km a day, and a time which is 5 days.
If speed is equal to distance/time
Distance must equal speed multiplied by time, or 3 times 5.
This gives us 15km
If a kilometer is 1000 meters, then 15km is 15 times 1000, or 15000